■ Operation Manual overview

　You might need this manual in the future. Always keep it in a place where you can access it easily.

　The contents of this document and the specifications of the product could be changed without notice.

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Introduction

Thank you very much for purchasing a ZOOM L-20 LiveTrak (hereafter, "L-20").The L-20 has the following features.

20-channel digital mixer & multitrack recorder

The L-20 combines a digital mixer with 20 total input channels (16 mono and 2 stereo), a multitrack recorder that can simultaneously record up to 22 tracks, and a 22-in/4-out USB audio interface. Compact and lightweight, this digital mixer is easy to transport and can even be used with PA systems for live performances in rehearsal studios, cafés and other small venues.

High-quality mic preamps

The L-20 has high-quality mic preamps built-in for 16 channels. The high-quality analog inputs, which can provide +48V phantom power, have a -128dBu EIN rating and +60dB maximum input gain. In addition, channels 1 and 2 also support Hi-Z input, while channels 3 to 16 have PAD functions (26dB attenuation), enabling them to accept high levels of input.

6 MONITOR OUT channels

In addition to the MASTER OUT, the L-20 also has 6 MONITOR OUT channels. The MONITOR OUT mixes can be set separately for each output, enabling different mixes to be sent to individual performers. Moreover, they support output to both headphones and monitor speakers.

Digital mixer that can be operated intuitively

Opening menus is not necessary with the L-20. Every mixer parameter can be controlled with knobs and keys just like an analog mixer. Each channel has a 3-band EQ, and the mono channels have compressor functions. The mixer also includes high-quality send effects. In addition, up to 9 mixer status scenes can be saved in the unit.

Recorder can simultaneously record 22 tracks and play 20 tracks

The L-20 can simultaneously record every channel and the master fader stereo signal output for a total of 22 tracks. Since the recorded data is saved in 16/24-bit, 44.1/48/96 kHz WAV format, the files can easily be copied to a computer and used in a DAW. In addition, overdubbing and punching in/out can be done as expected with a multitrack recorder.

22-in/4-out USB audio interface

The L-20 can be used as a 22-in/4-out USB audio interface. The signals from each input and the master fader output can be recorded in a DAW. In addition, signals output from a computer can also be assigned to a stereo channel.

Class compliant mode, which enables connection with iOS devices, is also supported.

Operate the L-20 from an iPad using a controller app

By connecting a BTA-1 or other ZOOM-specific wireless adapter (sold separately) and using the dedicated controller app, the L-20 can be operated from an iPad. See the ZOOM website (www.zoom.co.jp) for the controller app.

Names and functions of parts

Top

Input channel section

①MIC/LINE input jack

　These input jacks have built-in mic preamps. Connect mics, keyboards and guitars to them. These can be used with both XLR and 1/4-inch (balanced or unbalanced) phone plugs.

②48V switch/indicator

　This turns +48 V phantom power on or off. Turn this on () to supply phantom power to MIC/LINE input jacks 1-4, 5-8, 9-12 or 13-16.

　The indicator lights when the switch is on.

③Hi-Z switch

　Use to switch the input impedance of MIC/LINE input jack 1 (or 2).

　Turn it on () when connecting a guitar or bass guitar.

④PAD switch

　This attenuates (reduces) the input signal of the equipment connected to the MIC/LINE input jack by 26 dB.

　Turn this on () when connecting line level equipment.

⑤SIG indicator

　This indicator shows the signal level after adjustment by the GAIN knob.

　The indicator color changes according to the signal level. Adjust so that it does not light red.

　Lit red: Lit red: input signal level is close (-3 dBFS or higher) to the clipping level (0 dBFS)

　Lit green: Lit green: input signal level is between -48 dBFS and -3 dBFS compared to the clipping level (0 dBFS)

⑥GAIN knob

　Use to adjust the input gain of the mic preamp.

　The range of adjustment depends on the on/off status of the MIC/LINE input jack switch (Hi-Z on channels 1-2 or PAD on channels 3-16).

Jack | Adjustment range
MIC/LINE input jack 1-2 (XLR) | +16 - +60 dB
MIC/LINE input jack 1-2 (TRS) | Hi-Z off　+16 - +60 dB
MIC/LINE input jack 1-2 (TRS) | Hi-Z on (TS)　+6 - +50 dB
MIC/LINE input jack 3-16 | PAD off　+16 - +60 dB
MIC/LINE input jack 3-16 | PAD on　-10 - +34 dB

⑦COMP knob

　Use to adjust the amount of compression.

⑧SEL button

　Use to select a channel for parameter adjustment in the channel strip section.

　Channels with lit SEL buttons are affected by channel strip section adjustments.

⑨REC/PLAY button

　Use this button to switch between recording input signals to the SD card and playing back an already recorded file from the SD card.

Status | Explanation
Lit red | Input signals will be recorded to the SD card.
Lit green | An already recorded file will be played back. Playback signals are input before the equalizer. In this state, only files are played back. Signals from input jacks are disabled.
Unlit | Files will neither be recorded nor played back.

NOTE

Recorded signals can be set to either before or after the compressor. (→"Changing the input signal recording source")

⑩LINE input jacks (TS)

　Use these input jacks to connect line level equipment. For example, connect keyboards or audio devices.

　These can be used with 1/4-inch (unbalanced) phone plugs.

NOTE

If only the left LINE input jack (TS) channel is connected, it will be handled as a mono channel.

⑪LINE input jacks (RCA)

　Use these input jacks to connect line level equipment. For example, connect audio devices.

　These can be used with RCA pin connectors.

NOTE

If both the RCA and TS LINE input jacks are connected, the TS input jacks will be used.

⑫USB button

　This switches the signals input to channels 17/18 (or 19/20).

　Lit: audio return signal output from the computer

　Unlit: LINE input jacks

NOTE

Connect the L-20 to a computer as an audio interface. (→"Connecting to a computer")

⑬MUTE button

　This mutes or unmutes signals.

　To mute the channel, press this button to light it.

HINT

This has no effect on recording to the SD card.

⑭SOLO button

　When a SOLO button is ON, the pre-fader signal can be heard from the PHONES jack. At such times, the SELECT knob will automatically select SOLO.

⑮Level meter

　This shows the signal level after adjustment by the channel fader.

　Range shown: -48 dB - 0 dB

NOTE

If the actual channel fader position differs from the channel fader position recalled using the scene function, for example, the level meter will show the recalled fader position.

⑯Channel fader

　This adjusts the channel signal level in a range from -∞ to +10 dB.

CHANNEL STRIP section

①SEND EFX1 knob

　The amount that can be sent to the SEND EFX 1 bus can be set from -∞ to +10 dB.

②SEND EFX2 knob

　The amount that can be sent to the SEND EFX 2 bus can be set from -∞ to +10 dB.

③HIGH knob

　This adjusts the boost/cut of high-frequency equalization.

　Type: shelving

　Gain range: -15 db - +15 dB

　Frequency: 10 kHz

④MID FREQ knob

　This adjusts the central frequency of the mid frequency equalization.

　Frequency: 100 Hz-8 kHz

⑤MID knob

　This adjusts the boost/cut of mid-frequency equalization.

　Type: peaking

　Gain range: -15 db - +15 dB

　Frequency: set by MID FREQ knob

⑥LOW knob

　This adjusts the boost/cut of low-frequency equalization.

　Type: shelving

　Gain range: -15 db - +15 dB

　Frequency: 100 Hz

⑦PAN knob

　This adjusts the position in the stereo output bus.

　On a stereo input channel, this adjusts the volume balance between the left and right channels.

⑧LOW CUT knob

　This adjusts the high-pass filter, which cuts low frequencies. Signals below the set frequency are attenuated 12 dB/octave. Turning the LOW CUT knob left so that all the LEDs around it become unlit turns off the LOW CUT.

　Frequency: OFF, 40-600 Hz

⑨Φ (polarity) button

　This reverses the polarity of the selected channel.

⑩EQ OFF button

　When this button is lit, HIGH, MID, LOW and LOW CUT are bypassed.

FADER MODE section

①MASTER and A-F buttons

　These switch between the mixes output from the MASTER OUT and MONITOR OUT A-F jacks.

　MASTER button: Use to show and adjust the mix output from the MASTER OUT jacks.

　A-F buttons: Use to show and adjust the mixes output from the MONITOR OUT A-F jacks.

NOTE

The following parameters can have separate settings for the MASTER and A-F mixes.

- Fader positions (each channel)

- EFX1/2 RTN positions

Send effect (SEND EFX) section

①Effect 1/2 type lists

　These are lists of the built-in effects. The effects are separated into two sets, and one effect from each set can be used.

　The names of the currently selected effects light. An effect name blinks when being selected.

　If some time passes without a different effect being selected, the previously selected effect will remain selected.

②EFX1/EFX2 TYPE knobs

　Use to select the built-in effects.

　Turn these knobs to select effect types, and press them to confirm.

③Parameter 1 and 2 knobs

　Use these to adjust the parameters for the selected effects.

　See "Send effect specifications" for the parameters of each effect.

④MUTE button

　This mutes or unmutes the signal sent from the built-in effect.

　To mute the channel, press this button to light it.

⑤SOLO button

　When a SOLO button is ON, the signal before the EFX 1/2 RTN fader can be heard from the PHONES jack. At such times, the SELECT knob will automatically select SOLO.

⑥EFX RTN level meters

　These show the levels of the signals sent from the built-in effect to the master bus after adjustment by the EFX RTN fader. Their range is from -48 dB to 0 dB.

⑦EFX RTN fader

　This adjusts the levels of the signals sent from the built-in effect to the master bus in a range from -∞ dB to +10 dB.

NOTE

If the actual channel fader position differs from the channel fader position recalled using the scene function, for example, the level meter will show the recalled fader position.

SCENE section

①ON button

　Press this button, lighting it, to use the scene function

②RESET button

　Press this button to reset the current mixer settings to the factory defaults.

③1-9 buttons

　Use these buttons to select the scene to use to save the current mixer settings and to load saved scenes.

　If the current mixer settings match the settings of a scene, the corresponding number button will light.

　This unit can save up to 9 scenes.

④RECALL button

　Use this button when loading scenes saved to buttons 1-9.

　When this button is pressed, buttons 1-9 will blink if they have saved scenes and be unlit if they do not. To recall a saved scene, press a blinking button between 1 and 9. To cancel recalling a scene, press the RECALL button again.

⑤SAVE button

　Use this button when saving the current mixer settings to a scene.

　When this button is pressed, buttons 1-9 will light if they have saved scenes and blink if they do not. To save a scene, press a button between 1 and 9 to save it to that number. To cancel saving a scene, press the SAVE button again.

Output section

①MASTER OUT jacks

　These jacks output signals after volume adjustment by the master fader.

　Connect them to a power amplifier, a PA system or speakers with built-in amplifiers, for example.

　These support balanced output with XLR connectors (2 HOT).

②MONITOR OUT A-F jacks

　These jacks output signals after volume adjustment by the MONITOR OUT A-F knobs.

　Connect monitor speakers or headphones for performers here.

　These support balanced 1/4-inch phone jack output.

NOTE

・The MONITOR OUT A-F jacks can be set to output the same signals as the MASTER OUT jacks or the signals set separately in the fader mode section. (→"Setting signals output from MONITOR OUT A-F")

・Set the MONITOR OUT A-F PHONES/SPEAKER switch according to the type of connected equipment.

③MONITOR OUT A-F knobs

　Use to adjust the volumes of the signals output from the MONITOR OUT A-F jacks.

④MONITOR OUT A-F switches

　These switch the signals output from the MONITOR OUT A-F jacks.

Status | Explanation
MASTER ( ) | The signal after adjustment by the master fader will be output.
A-F ( ) | The signals set in the FADER MODE section are output.

⑤MONITOR OUT A-F PHONES/SPEAKER switches

　Use these to select the type of equipment connected to the MONITOR OUT A-F jacks.

Status | Explanation
（ ） | Select this when headphones are connected. A stereo signal is output from the MONITOR OUT A-F jack.
（ ） | Select this when speakers are connected. A mono balanced signal is output from the MONITOR OUT A-F jack.

⑥SELECT knob

　Use this to select the signal output from the PHONES jack.

　The options are MASTER, SOLO and MONITOR OUT A-F.

Status | Explanation
MASTER | The same signals as the MASTER OUT are output.
A-F | The signals set in the FADER MODE section are output.
SOLO | The signals of SOLO enabled channels are output.

NOTE

When a SOLO button is activated, this knob will also automatically select SOLO. At such times, changing the output with the SELECT knob will cancel soloing.

⑦VOLUME knob

　Use this to adjust the volume of the PHONES jack.

⑧PHONES jack

　Connect headphones here.

⑨MASTER REC/PLAY button

　Use this button to switch between recording the signal input on the master bus to the SD card and playing back an already recorded file from the SD card.

Status | Explanation
Lit red | The signal will be recorded to the SD card after adjustment by the master fader.
Lit green | The playback signal of a file is inserted on the master bus. The REC/PLAY buttons of other channels will be unlit at this time.
Unlit | Files will neither be recorded nor played back.

⑩MASTER MUTE button

　This mutes or unmutes the MASTER OUT jacks. To mute the channel, press this button to light it.

⑪Master level meters

　These show the signal levels output from the MASTER OUT jacks in a range from -48 dB to 0 dB.

⑫Master fader

　This adjusts the signal levels output from the MASTER OUT jacks in a range from -∞ to +10 dB.

NOTE

If the actual channel fader position differs from the channel fader position recalled using the scene function, for example, the level meter will show the recalled fader position.

When AUTO REC is activated, however, the master fader position will not be shown.

RECORDER section

①Slate mic

　This is a built-in mic for recording comments.

　This mic input is active while the SLATE button is being pressed.

　It can be set to record on channels 1-20, the MASTER channel or all channels. (→"Changing the slate mic routing")

②SLATE button/indicator

　This activates the slate mic.

　The slate mic is activated while this button is being pressed and its indicator is lit.

③Display

　This shows the recorder status and MENU screen.

④MENU button

　This opens the menu.

⑤Selection encoder

　Use this to change menus and values and to move between items.

Operation | Result
Turn when Home Screen open | Search forward or backward in one-second increments.
Press when Home Screen open | Set a mark.
Turn when menu open | Move between parameters and change values.
Press when menu open | Confirm parameter value.

⑥TEMPO button/indicator

　This sets the tempo of the metronome built into the recorder.

　Press this button to make the recorder detect the tempo from the average value.

　The indicator blinks at a tempo of 40.0-250.0 bpm during recording, playback and when one of the following effects that synchronize with tempo is selected.

　Effects that synchronize with the tempo: Delay, Analog, P-P Dly

　Metronome settings (→"Changing metronome settings")

⑦STOP button

　This stops the recorder.

⑧PLAY/PAUSE button/indicator

　This starts and pauses recorder playback. The indicator shows the playback status as follows.

Status | Explanation
Lit green | The recorder is playing back.
Blinking green | Playback is paused.

⑨REC button/indicator

　This puts the recorder in recording standby. The indicator shows the recording status as follows.

Status | Explanation
Lit red | The recorder is recording or in recording standby.
Blinking red | Recording is paused.

⑩REW button

　Press to move to the previous mark.

　If no mark is set, this moves to the beginning. Press this button when at the beginning to move to the previous project.

　Press and hold to search backward. (The longer you press, the faster the speed becomes.)

⑪FF button

　Press to move to the next mark.

　If it is the last mark, this moves to the end of the file. Press this button again to move to the next project.

　Press and hold to search forward. (The longer you press, the faster the speed becomes.)

⑫OVER DUB button/indicator

Status | Explanation
Lit (ON) | Record by overwriting into the current project folder.
Unlit (OFF) | Create a new project folder and make a new recording.

Rear panel

①POWER switch

　This turns the unit on and off.

　Switch to — to turn the power on. Switch to ○ to turn the power off.

　When the POWER switch setting is changed to OFF, the current mixer settings are automatically saved in the unit and in the settings file in the project folder on the SD card.

②DC IN 12V AC adapter connector

　Connect the included AC adapter here.

③USB HOST port

　This USB 2.0 HOST port is for connecting USB flash drives.

　Projects and audio files can be saved on and loaded from connected USB flash drives.

④MODE switch

　Set whether to use as a USB HOST, card reader or audio interface.

　This cannot be changed after starting up.

⑤USB DEVICE port

　This USB 2.0 port is for connecting with a computer.

　It will start up as a card reader or audio interface, depending on the MODE switch selection.

　Card reader mode

　Operating as an SD card reader, data can be exchanged with a computer.

　Audio interface mode

　Operating as an audio interface, audio data can be exchanged with a computer.

　Inputs: The signals from channels 1-20 after they pass through their compressors and the master fader output signals are input to the computer.

　Outputs: Outputs from the computer can be assigned to channels 17/18 and 19/20.

　Use when connected to an iOS device is possible if the CLASS COMPLIANT MODE switch is set to ON.

⑥CLASS COMPLIANT MODE switch

　Use this to turn Class Compliant Mode ON/OFF.

　Set it to ON when connected to an iOS device.

⑦SAMPLE RATE switch

　Set the sampling rate used by the unit.

　This cannot be changed after starting up.

⑧SD card slot

　This slot is for SD cards.

　The L-20 supports SDHC and SDXC card specifications.

HINT

You can test whether an SD card can be used with the L-20. (→"Testing SD card performance")

⑨CONTROL IN jack

　A footswitch (ZOOM FS01) can be connected here.

　The footswitch can be assigned to one function: starting/stopping recorder playback, manually punching in/out or muting/unmuting the built-in effect. (→"Setting the footswitch")

⑩REMOTE jack

　A BTA-1 or other ZOOM-specific wireless adapter (sold separately) can be connected here.

　This enables operation of the L-20 from an iPad using a controller app

Equipment connection examples

Live PA system

Display overview

Home Screen

Item
Explanation

①　Project name

This shows the project name.

"<" appears if there is another project before this one in the folder.

">" appears if there is another project after this one in the folder.

②　Status icon

This shows the status as follows.

: Stopped

: Paused

: Recording

: Playing back

③　Counter
This shows the hour: minute: second.

④　Progress bar
The progress bar shows the amount of time from the beginning to the end of the project.

⑤　Folder name
The folder where the project is saved will be shown as FOLDER01 - FOLDER10.

⑥　PLAY MODE icon
This shows the PLAY MODE setting. (→"Changing the playback mode")

⑦　Metronome icon
This is shown when the metronome is enabled. (→"Enabling the metronome")

⑧　Project protection icon
This is shown when project protection is enabled. (→"Protecting projects")

⑨　Remaining recordable time

This shows the remaining recordable time.

This will change automatically according to the number of channels that have recording enabled with .

⑩　Recording file format
This shows the recording file format used by the recorder.

⑪　Current date and time
This shows the current date and time.

⑫　SD card icon
This is shown when an SD card is detected.

⑬　Mark

This shows the mark number and the status as follows.

: at mark (mark added at counter location)

: not at mark (mark not added at counter location)

⑭　Longest file time in project
This shows the length of the longest file in the project.

Turning the power on and off

Turning the power on

1. Confirm that the output devices connected to the L-20 are turned off.

2. Confirm that is set to OFF.

3. Plug the specified adapter (AD-19) into an outlet.

4. Set all knobs and faders to their minimum values.

5. Connect instruments, mics, speakers and other equipment.

HINT

Equipment connection example (→"Equipment connection examples")

6. Set to ON.

7. Turn on the output devices connected to the L-20.

・When using a passive guitar or bass guitar, connect it to channel 1 or 2, and turn on. (→"Top")

・When using a condenser mic, turn on. (→"Top")

・The power will automatically turn off if the L-20 is unused for 10 hours. If you want the power to stay on always, disable the automatic power saving function (→"Disabling the automatic power saving function")

Turning the power off

1. Minimize the volume of output devices connected to the L-20.

2. Turn off the power of output devices connected to the L-20.

3. Set to OFF.

The following screens appear and the power turns off.

NOTE

When the power is turned off, the current mixer settings are saved in the project on the SD card. If they cannot be saved to the SD card, they will be saved in the unit.

Using the MENU screen

Recorder function settings, for example are made for the L-20 using the MENU screen. This is an explanation of the basic menu operations.

Open the menu: Press

　　This opens the MENU screen.

Select menu items and parameters: Turn

　　This moves the cursor.

Confirm menu items and parameters: Press

　　This opens the selected MENU screen or parameter setting screen.

Return to previous screen: Press

　　This opens the selected MENU screen or parameter setting screen.

On the following pages, menu screen operations are shown in the following way.

For example, "After selecting 'METRONOME' on the MENU screen, select 'CLICK'" becomes:

Select MENU > METRONOME > CLICK.

Mixer

Outputting input sounds from output devices

Outputting sound from speakers

1. Use to adjust the input signals while inputting sound from instruments and mics.

NOTE

Set them so that SIG indicators do not light red.

2. Turn off (unlit) for the MASTER and the channels with sound you want to output.

3. Set the MASTER fader to 0.

4. Use the channel faders to adjust the volumes.

5. Use the MASTER fader to adjust the overall volume.

Outputting sound from headphones

1. Connect headphones to the PHONES jack.

2. Turn to select the bus you want to output from the PHONES jack, and press .

The options are MASTER, SOLO and MONITOR OUT A-F.

Status | Explanation
MASTER | The same signals as the MASTER OUT are output.
A-F | The signals set in the FADER MODE section are output.
SOLO | The signals of SOLO enabled channels are output.

3. Use to adjust the volume.

Adjusting the tone and panning

1. Press to light it for the channel for which you want to adjust tone and panning.

2. Use the knobs and buttons in the channel strip section to adjust the tone and panning.

Adjusting the tone: , , , ,

Adjusting the panning:

Reversing the polarity:

NOTE

・Press to light it, turning off all equalization at once. This will bypass HIGH, MID, LOW and LOW CUT settings.

・Using the compressor (→"Input channel section")

HINT

Details about each knob and button (→"CHANNEL STRIP section")

Using the built-in effects

The L-20 has 20 types of send effects in 2 banks.

1. Turn / to select the effect type, and press / to confirm.

2. Press to turn it off, unmuting EFX1/EFX2 RTN.

3. Set the EFX1/EFX2 RTN fader to 0.

4. Press for a channel that you want to use the effect on to light it.

5. Use / to adjust the amount for each channel.

6. Use the EFX1/EFX2 RTN fader to adjust the overall effect amount.

7. Use and to adjust the send effect parameters for EFX1/EFX2 RTN.

NOTE

Parameters of each effect that can be adjusted by and (→"Send effect specifications").

Using scene functions

The scene function can be used to save up to nine sets of current mixer settings as scenes and to recall these saved settings at any time.

Saving scenes

1. Click so that it lights.

This enables the scene function.

2. Press .

Buttons - will light if they have saved scenes and blink if they do not.

Press again if you do not want to save a scene.

3. Press the button where you want to save the scene.

NOTE

・Nine scenes are saved in the unit. (→"SCENE section")

・If a button that already has a scene saved is selected, that scene will be overwritten.

・The following items are saved with scenes.

　- Fader positions (each channel, EFX 1/2 RTN and MASTER)

　- MUTE ON/OFF (each channel, EFX 1/2 RTN and MASTER)

　- EQ OFF

　- LOW CUT

　- EQ HIGH

　- EQ MID

　- EQ MID FREQ

　- EQ LOW

　- SEND EFX 1/2

　- PAN

　- Φ

　- EFX 1/2 TYPE

　- EFX 1/2 parameters

　- USB button setting

Recalling scenes

1. Click so that it lights.

This enables the scene function.

2. Press .

Buttons - will blink if they have saved scenes and be unlit if they do not.

Press again if you do not want to recall a scene.

3. Press the button for the scene you want to recall.

The scene for the selected number is recalled.

NOTE

If the actual channel fader position differs from the channel fader position shown, the volume will not change until the fader is moved to the same position. (→"Input channel section")

Resetting mixer settings

1. Click so that it lights.

This enables the scene function.

2. Press .

Buttons - will blink if they have saved scenes and be unlit if they do not.

Press again if you do not want to reset the settings.

3. Press .

The current mixer settings are reset to their factory defaults.

Setting signals output from MONITOR OUT A-F

The MONITOR OUT A-F jacks can be set to output the same mix as the MASTER OUT or different mixes.

Adjusting the MONITOR OUT A-F mixes

1. Press an - button to select the output to mix.

The selected output button lights and operation of all the channel faders is enabled.

NOTE

The level meters show the fader positions. If the actual channel fader position differs from the channel fader position shown, the volume will not change until the fader is moved to the same position.

2. Use the channel faders to adjust the volumes.

Selecting MONITOR OUT A-F output signals

1. Use the MONITOR OUT switch for an output to select its output signal.

To output a mix set using MONITOR OUT A-F:

　Set the MONITOR OUT switch to A-F ( )

To output the same mix as the MASTER:

　Set the MONITOR OUT switch to MASTER ( )

NOTE

・Each output mix is saved with the scene and project.

・The parameters that can have separate settings for the MASTER and MONITOR OUT A-F are as follows.

　- Fader positions (each channel)

　- EFX1/2 RTN positions

Select the type of equipment connected to MONITOR OUT A-F

1. Set the MONITOR OUT PHONES/SPEAKER switch for the output according to the type of equipment connected.

To connect headphones to MONITOR OUT A-F:

　Set the MONITOR OUT PHONES/SPEAKER switch to ( ).

　A stereo signal will be output from the jack.

To connect speakers to MONITOR OUT A-F:

　Set the MONITOR OUT PHONES/SPEAKER switch to ( ).

　A mono balanced signal will be output from the jack.

Copying a mix

1. While pressing , - for the output you want to copy, press a blinking copy destination ( , - ).

This copies the mix from the source to the destination.

Recording and playback

Preparing to record

Inserting SD cards

1. Set to OFF.

2. Open the SD card slot cover, and insert an SD card all the way into the slot.

To remove an SD card, push it further into the slot and then pull it out.

NOTE

・Disable write-protection on the SD card before inserting it.

・Always set to OFF before inserting or removing an SD card.

　Inserting or removing a card while the power is on could result in data loss.

・When inserting an SD card, be sure to insert the correct end with the top side up as shown.

・If an SD card is not loaded, recording and playback are not possible.

・To format an SD card, see "Formatting SD cards".

・Use an SD card that is Class 10 or higher.

・Format an SD card before recording to it at 96 kHz. If you record without formatting first, skipping could occur.

Creating new projects

The L-20 manages recording and playback data in units called projects.

1. Select MENU > PROJECT > NEW PROJECT.

2. Use to select YES, and press .

NOTE

・See "Projects" for information about projects.

・When a new project is created, it will start with the current mixer settings.

HINT

When the L-20 power is turned on, it will automatically load the last used project.

Recording/overdubbing and playing tracks

The L-20 has recorder functions that enable simultaneous recording of up to 22 tracks and simultaneous playback of up to 20 tracks.

The input signals of every channel and from the master fader output can be recorded. These recordings can also be played back.

Recording

1. Use to turn overdubbing on or off.

2. Press for the channels you want to record, lighting these buttons red.

3. Press to start recording standby.

HINT

If a recorded file already exists, and is off, pressing will create a new project and then start recording standby.

4. Press to start recording.

5. Press to stop recording.

NOTE

・The signals recorded on each channel can be set to either before or after the compressor. (→"Changing the input signal recording source")

・Punching in/out (→"Redoing parts of recordings (punching in/out)")

・Starting recording automatically (→"Starting recording automatically")

・Capturing audio before recording starts (→"Pre-recording before recording starts")

・When recording stops, "Please Wait" appears on the display. Do not turn the power off or remove the SD card while this message appears. Doing so could cause data loss or malfunction.

Playing recordings

1. Press for the channels you want to play, lighting these buttons green.

2. Press to start playback.

3. Press to stop playback.

NOTE

・Playback signals are added before the equalizer section, so their EQ and panning settings can be adjusted during playback. (→"Mixer block diagram")

・If recorded signals are pre-compressor, playback signals will be inserted before the compressor. (→"Changing the input signal recording source")

・Selecting projects for playback (→"Selecting projects for playback")

・Changing the playback mode (→"Changing the playback mode")

・Other channels cannot be played back when the MASTER channel is playing back.

Adding marks

Adding marks at desired positions with the recorder makes moving to those positions easy.

Adding marks during recording and playback

1. Press during recording/playback.

Moving in mark order

1. Use these buttons to move in mark order.

Move to next mark: Press

Move to previous mark: Press

NOTE

Checking and deleting marks in projects (→"Checking, deleting and moving to marks")

HINT

・A maximum of 99 marks can be added to one project.

・You can also delete a mark by pressing when at the mark position.

Redoing parts of recordings (punching in/out)

Punching in/out is a function that can be used to rerecord parts of already recorded tracks. "Punching in" is switching track status from playback to recording. "Punching out" is switching track status from recording to playback.

With the L-20 , punching in/out can be conducted using buttons on its top or a footswitch (ZOOM FS01).

1. Press to turn it on (lighting its indicator).

2. Press repeatedly for the tracks to rerecord until they light red.

3. Press or turn left to move to before the part to be rerecorded.

4. Press to start playback.

5. Press at the position where you want to start rerecording (punch in).

6. Press to end rerecording (punch out).

NOTE

・Punching in/out using a footswitch (ZOOM FS01) (→"Setting the footswitch")

・Punching in/out overwrites recordings.

・Punching in/out can be done up to 99 times each time playback is started.

7. Press to stop playback.

Mixing down tracks

A final stereo mix can be recorded to the master track.

Signals are sent to the master track after passing through the master fader.

Mixing down to the master track

1. Click so that it lights.

NOTE

・Adjust the volume and panning of each recorded track before starting.

・When mixing down, set the sampling rate to 44.1 kHz or 48 kHz.

　If the sampling rate is 96 kHz, the OVER DUB button cannot be set to ON.

2. Press MASTER repeatedly until it lights red.

3. Press to return to the recording beginning.

4. Press to start recording standby.

5. Press to start recording.

6. Press to end mixing down.

Playing the master track

1. Press MASTER repeatedly until it lights green.

2. Press .

NOTE

・To stop master track playback, press MASTERrepeatedly until it becomes unlit.

・When the master track is playing, other tracks will not be played back.

・To listen to master track playback from a MONITOR OUT, set the MONITOR OUT A-F switch to MASTER ().

・To listen to master track playback from the main headphone jack for the mixer operator, set the SELECT knob to MASTER.

Starting recording automatically

Recording can be started and stopped automatically in response to the level after passing through the master fader.

1. Select MENU > REC/PLAY > AUTO REC > ON/OFF.

2. Use to select ON, and press .

NOTE

Making additional settings for automatic recording (→"Changing automatic recording settings")

3. Press repeatedly to return to the Home Screen.

4. Press .

The indicator will light and recording standby will start.

The MASTER level meters will blink at the level that will cause automatic recording to start.

HINT

Recording starts automatically when the input exceeds the set level (shown by the MASTER level meters).

You can also set recording to stop automatically when the input goes below a set level. (→"Setting automatic stopping")

5. Press to end recording standby or stop recording.

NOTE

・This function cannot be used with the PRE REC, METRONOME or PRE COUNT functions. When you turn AUTO REC on, these other functions will be disabled.

・When the OVER DUB function is enabled, the AUTO REC function will be disabled.

Pre-recording before recording starts

The input signal can be captured for up to 2 seconds before recording is started (pre-recording). Setting this in advance can be useful when a performance starts suddenly, for example.

1. Select MENU > REC/PLAY > PRE REC.

2. Use to select ON, and press .

NOTE

・This function cannot be used with the AUTO REC, METRONOME, PRE COUNT or OVER DUB functions.

・When you turn AUTO REC or PRE COUNT on, PRE REC will be disabled.

・The PRE REC function continues to be enabled even when recording is paused.

Selecting the folder where projects are saved

Choose one of ten folders as the folder where recorded projects will be saved.

1. Select MENU > FOLDER.

2. Use to select the folder where you want to save, and press .

NOTE

・Up to 1000 projects can be saved in a single folder.

・If a folder that does not have a project is selected, a new project will be created automatically.

Selecting projects for playback

Projects saved on SD cards can be loaded.

1. Select MENU > PROJECT > SELECT.

2. Use to select the project you want to load, and press .

NOTE

・Projects in different folders cannot be selected. To select a project that is saved in a different folder, select that folder first. (→"Selecting the folder where projects are saved")

・When a project is loaded, the mixer settings saved in that project are also loaded.

・If actual channel fader positions differ from the channel fader positions of the loaded project, the level meters will show the recalled fader positions. The volume will not be changed until the actual fader position becomes the same as the recalled position.

・When switching to a different project, the project mixer settings of the current project are saved to the settings file in the project folder.

Using the metronome

The L-20 metronome has adjustable volume, a selectable sound, and a precount function. The volume can also be adjusted separately for each output. Metronome settings are saved separately with each project.

Enabling the metronome

1. Select MENU > METRONOME > CLICK.

2. Use to select when the metronome makes sound, and press .

Setting values | Explanation
OFF | The metronome does not make sound.
REC AND PLAY | The metronome sounds during recording and playback.
REC ONLY | The metronome sounds only during recording.
PLAY ONLY | The metronome sounds only during playback.

Changing metronome settings

Changing the metronome tempo

1. Press .

The current tempo is shown on the display.

2. Do one of the following to change the tempo.

・Turn

・Press repeatedly at the tempo you want to set

Setting the precount

A metronome count can be sounded before starting recording/playback.

1. Select MENU > METRONOME > PRE COUNT.

2. Use to select the precount behavior, and press .

Setting values
Explanation

OFF
No precount will sound.

1-8
Before recording/playback, the precount will sound for the set number of times (1-8).

SPECIAL

Before recording/playback, the precount will sound as shown below.

NOTE

・The precount is enabled even during playback.

・This function cannot be used with the AUTO REC function. When you turn AUTO REC on, PRE COUNT will be disabled.

・This function cannot be used with the PRE REC function. When you turn PRE COUNT on, PRE REC will be disabled.

Changing the metronome sound

1. Select MENU > METRONOME > SOUND.

2. Use to select the sound, and press .

HINT

The options are BELL, CLICK, STICK, COWBELL and HI-Q.

NOTE

Press to play the metronome and check the sound.

Changing the metronome pattern

1. Select MENU > METRONOME > PATTERN.

2. Use to select the pattern, and press .

HINT

The options are 1/4-8/4 and 6/8.

NOTE

Press to play the metronome and check the pattern.

Changing the metronome volume

The metronome volume can be adjusted separately for the MASTER OUT and the MONITOR OUT A-F outputs.

1. Select MENU > METRONOME > LEVEL > MASTER or A-F.

2. Turn to adjust the volume, and press

HINT

Set from 0 to 100.

NOTE

Press to play the metronome and check the sound.

Using the slate mic

The L-20 has a built-in slate mic that is useful for adding comments and talk-back during recording.

Recording with the slate mic

1. Start recording. (→"Recording")

2. Press to enable the slate mic.

While is being pressed, the indicator lights and the slate mic is enabled.

NOTE

・When the slate mic is in use, signals from input jacks are muted to the channels to which the slate mic is routed.

・None of the channel faders affect the level of the slate mic.

Changing slate mic settings

Changing the slate mic volume

1. Select MENU > SLATE > LEVEL.

2. Turn to adjust the volume, and press .

Changing the slate mic routing

1. Select MENU > SLATE > ROUTING.

2. Turn to select a channel for routing.

3. Press to confirm.

4. Press .

HINT

Pressing toggles it ON/OFF.

Projects

The L-20 manages recording and playback data in units called projects.

The following data is saved in projects.

・Audio data

・Mixer settings

・Send return effect settings

・Mark information

・Metronome settings

Changing project names

The name of the currently loaded project can be changed.

1. Select MENU > PROJECT > RENAME.

2. Edit the name.

Move cursor or change character: Turn

Select character to change/confirm change: Press

NOTE

・The default project name is the date and time of creation.

　For example, if a project was created at 6:48:20 p.m. on Wednesday, March 14, 2018, the project name would be "180314_184820" (YYMMDD_HHMMSS).

・Project names have 13 characters.

・The following characters can be used in project and file names.

　(space) ! # $ % & ' ( ) + , - 0 1 2 3 4 5 6 7 8 9 ; = @

　A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ ] ^ _ `

　a b c d e f g h i j k l m n o p q r s t u v w x y z { ~ }

・Projects can be ordered numerically or alphabetically.

・Project/file names cannot be only spaces.

・The project name is the same as the project folder name on the SD card.

3. Press .

Deleting projects

Projects inside the selected folder can be deleted.

1. Select MENU > PROJECT > DELETE.

2. Use to select the project you want to delete, and press .

3. Use to select YES, and press .

NOTE

Projects cannot be deleted if protection is ON.

Protecting projects

The currently loaded project can be write-protected, preventing the project from being saved, deleted or having its content changed.

1. Select MENU > PROJECT > PROJECT PROTECT.

2. Use to select ON, and press .

NOTE

・Projects cannot be used for recording if protection is ON. Turn protection OFF to record.

・When protection is OFF for a project, it will always be saved to the SD card when the power is turned off or another project is loaded. We recommend turning protection ON to prevent accidentally saving changes to a musical project after it has been completed.

Checking project information

Various information about the currently loaded project can be viewed.

1. Select MENU > PROJECT.

2. Use to select INFORMATION, and press .

Item shown | Explanation
NAME | Project name
PATH | Location where project saved
DATE | Project creation date (YYYY/MM/DD HH:MM:SS)
FORMAT | Recording format
SIZE | Project size
TIME | Project length (HHH: MM: SS)
FILES | Information about tracks and files

Saving projects to USB flash drives

A USB flash drive can be connected directly to the L-20, and the currently loaded project can be saved to it.

1. Set to OFF.

2. Connect the USB flash drive to the USB HOST port.

3. Set to USB HOST.

4. Set to ON.

5. Select MENU > PROJECT > PROJECT EXPORT.

6. Edit the name.

Move cursor or change character: Turn

Select character to change/confirm change: Press

NOTE

・The default project name is the date and time of creation.

　For example, if a project was created at 6:48:20 p.m. on Wednesday, March 14, 2018, the project name would be "180314_184820" (YYMMDD_HHMMSS).

・Project names have 13 characters.

・The following characters can be used in project and file names.

　(space) ! # $ % & ' ( ) + , - 0 1 2 3 4 5 6 7 8 9 ; = @

　A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ ] ^ _ `

　a b c d e f g h i j k l m n o p q r s t u v w x y z { ~ }

・Projects can be ordered numerically or alphabetically.

・Project/file names cannot be only spaces.

・The project name is the same as the project folder name on the SD card.

7. Press .

8. Use to select YES, and press .

NOTE

・The folder structure on USB flash drives is as follows.

　Never change this folder structure.

・Projects will be saved on the USB flash drive in the "PROJECT" subfolder of the "ZOOM_L-20" folder.

・Never disconnect a USB flash drive when "Please Wait ..." appears on the display.

Importing projects from USB flash drives

Projects saved on USB flash drives can be copied to SD cards.

NOTE

Use a computer to create "ZOOM_L-20" and "PROJECT" folders on the USB flash drive in advance (→"Saving projects to USB flash drives"). Only projects inside the "PROJECT" folder can be imported.

1. Set to OFF.

2. Connect the USB flash drive to the USB HOST port.

3. Set to USB HOST.

4. Set to ON.

5. Select MENU > PROJECT > PROJECT IMPORT.

6. Use to select the project you want to load from the USB flash drive, and press .

7. Edit the name.

Move cursor or change character: Turn

Select character to change/confirm change: Press

NOTE

・The default project name is the date and time of creation.

　For example, if a project was created at 6:48:20 p.m. on Wednesday, March 14, 2018, the project name would be "180314_184820" (YYMMDD_HHMMSS).

・Project names have 13 characters.

・The following characters can be used in project and file names.

　(space) ! # $ % & ' ( ) + , - 0 1 2 3 4 5 6 7 8 9 ; = @

　A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ ] ^ _ `

　a b c d e f g h i j k l m n o p q r s t u v w x y z { ~ }

・Projects can be ordered numerically or alphabetically.

・Project/file names cannot be only spaces.

・The project name is the same as the project folder name on the SD card.

8. Press .

9. Use to select YES, and press .

NOTE

・Imported projects are saved in the currently selected folder.

・Never disconnect a USB flash drive when "Please Wait ..." appears on the display.

Checking, deleting and moving to marks

A list of marks in the currently loaded project can be opened, allowing them to be checked, moved to and deleted.

1. Select MENU > PROJECT > MARK LIST.

A list of marks appears.

2. Turn to select a mark, and move to or delete it.

Press to move to the mark position.

Press to delete the mark.

Audio files

The L-20 creates the following types of audio files according to the recording channel.

・Channels 1-16: mono WAV files

・Channels 17/18, 19/20 and MASTER: stereo WAV files

The file format depends on the sampling rate (→"Changing the sampling rate") and quantization bit depth (→"Changing the recording format") used by the unit.

The L-20 can also play back audio files created using DAW software (→"Importing audio files from USB flash drives").

NOTE

・The names given to audio files depend on their channels.

　Channels 1-16: TRACK01-TRACK16

　Channels 17/18, 19/20: TRACK17_18, TRACK19_20

　MASTER: MASTER

・If the file size exceeds 2 GB during recording, a new file will be created automatically in the same project and recording will continue without pause. When this happens, numbers like "_01" and "_02" will be added to the ends of the file names.

Deleting audio files

Audio files that are not needed can be deleted.

1. Select MENU > PROJECT > FILE DELETE.

2. Use to select the file you want to delete, and press .

NOTE

Press to select/deselect all files.

3. Press .

4. Use to select YES, and press .

NOTE

Audio files cannot be deleted if protection is ON for their projects.

Exporting audio files to USB flash drives

The desired audio files can be exported from projects to USB flash drives.

Exported audio files will be saved on the USB flash drive in the "AUDIO" subfolder of the "ZOOM_L-20" folder.

1. Set to OFF.

2. Connect the USB flash drive to the USB HOST port.

3. Set to USB HOST.

4. Set to ON.

5. Select MENU > PROJECT > FILE EXPORT.

6. Use to select a file you want to export, and press .

7. Edit the name.

Move cursor or change character: Turn

Select character to change/confirm change: Press

NOTE

・Audio file names have 24 characters.

・The following characters can be used in project and file names.

　(space) ! # $ % & ' ( ) + , - 0 1 2 3 4 5 6 7 8 9 ; = @

　A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ ] ^ _ `

　a b c d e f g h i j k l m n o p q r s t u v w x y z { ~ }

・Project/file names cannot be only spaces.

8. Press .

9. Use to select YES, and press .

NOTE

・Never disconnect a USB flash drive when "Please Wait ..." appears on the display.

・Audio files will be saved on the USB flash drive in the "AUDIO" subfolder of the "ZOOM_L-20" folder.

Importing audio files from USB flash drives

The desired audio files can be imported from USB flash drives to existing projects and assigned to channels.

NOTE

Use a computer to create "ZOOM_L-20" and "AUDIO" folders on the USB flash drive in advance (→"Saving projects to USB flash drives"). Only audio files inside the "AUDIO" folder can be imported.

1. Set to OFF.

2. Connect the USB flash drive to the USB HOST port.

3. Set to USB HOST.

4. Set to ON.

5. Select MENU > PROJECT > FILE IMPORT.

6. Use to select the file you want to import, and press .

NOTE

Audio files cannot be imported from USB flash drives into projects that have protection ON.

7. Use to select the channel where you want to assign the file, and press .

NOTE

・Mono WAV files can be assigned to mono channels and stereo WAV files can be assigned to stereo channels.

・Files cannot be imported to channels that already have files assigned to them.

・When files are imported, their file names will automatically be changed according to their import channels.

8. Use to select YES, and press .

NOTE

Never disconnect a USB flash drive when "Please Wait ..." appears on the display.

Using audio interface functions

The L-20 can be used as a 22-in/4-out USB audio interface. After applying its compressor, each input channel always outputs its signal to the corresponding USB audio channel. Channels 1-20 and the stereo signal output from the master fader are sent to the computer (22 channels total).

Installing the driver

1. Download the "ZOOM L-20 Driver" from http://www.zoom.co.jp to the computer.

NOTE

・You can download the latest "ZOOM L-20 Driver" from the above website.

・Download the driver for the operating system that you are using.

2. Launch the installer and install the driver.

Follow the instructions that appear on screen to install the ZOOM L-20 Driver.

NOTE

See the Installation Guide included in the driver package for detailed installation procedures.

Connecting to a computer

1. Use a USB cable to connect the USB DEVICE port to the computer.

2. Set the switch to AUDIO INTERFACE.

3. Set to ON.

NOTE

・Set to ON when connected to an iOS device.

・When connecting to an iOS device, use a Lightning to USB camera adapter (or Lightning to USB 3 camera adapter).

4. Set the L-20 as the computer sound device.

NOTE

・Audio interface functions cannot be used when the sampling rate is set to 96 kHz.

Inputting return signals from the computer to a stereo channel

1. Turn / ON for the stereo channel to use for input.

The signal controlled by the channel is switched to the USB audio channel signal (before EQ).

Using card reader functions

When connected to a computer, data on the SD card can be checked and copied.

1. Use a USB cable to connect the USB DEVICE port to the computer.

2. Set to CARD READER.

3. Set to ON.

NOTE

When operating as a CARD READER, other functions and buttons cannot be used.

Recording and playback settings

Changing the recording format

The recording format can be changed in consideration of audio quality and file size.

1. Open MENU > REC/PLAY > REC FORMAT.

2. Use to change the format, and press .

HINT

When overwriting a recording, recording will occur at the bit depth of the original file. For example, a file recorded at 16-bit cannot be overwritten with 24-bit recording.

Changing automatic recording settings

The conditions for automatically starting and stopping recording can be set.

Setting the automatic recording start level

1. Open MENU > REC/PLAY > AUTO REC > REC START LEVEL.

2. Use to change the start level, and press .

Recording will start automatically when the level of the MASTER fader output signal exceeds the set level.

HINT

This can be set from -48 to 0 dB.

Setting automatic stopping

1. Open MENU > REC/PLAY > AUTO REC > AUTO STOP.

2. Use to select the automatic stop time, and press .

HINT

This can be set to OFF or between 0 and 5 seconds.

3. Open MENU > REC/PLAY > AUTO REC > REC STOP LEVEL.

4. Use to set the stop level, and press .

Recording will stop automatically when the level of the MASTER fader output stays below the set level for the amount of time set in step 2.

NOTE

If you start recording after setting automatic recording starting and stopping, the level set in step 4 will be shown on the MASTER level meters.

Showing recording levels on level meters

The levels of signals recorded to the recorder can be shown on the level meters of each channel.

1. Open MENU > REC/PLAY > REC LEVEL METER.

2. Use to select ON, and press .

If recorded signal levels are higher than post fader levels, the recorded signal levels are shown lit dimly on the level meters.

Compensating for latency that occurs during input and output

The L-20 can compensate for latency that occurs during input and output if you want to listen to its output signal while overdubbing.

Use this menu item to set whether the latency that occurs during input and output is automatically compensated for or not when OVER DUB is ON.

When automatic compensation is enabled, the recording data is shifted by the amount of latency that occurs during input and output.

1. Open MENU > REC/PLAY > LATENCY ADJUST.

2. Use to select ON, and press .

Changing the playback mode

1. Open MENU > REC/PLAY > PLAY MODE.

2. Use to select the play mode, and press .

Setting values
Explanation

OFF
Only the selected project plays back. Playback continues even when the end of a file is reached.

PLAY ONE

(single song playback)

Only the selected project plays back. Playback stops when the end of a file is reached.

PLAY ALL

(all playback)

Every project from the selected one to the last one will be played back.

REPEAT ONE

(single song repeat playback)

The selected project will be played repeatedly.

REPEAT ALL

(all song repeat playback)

All projects in the selected folder will be played repeatedly.

Changing the input signal recording source

1. Open MENU > REC/PLAY > REC SOURCE.

2. Use to select the recording source, and press .

Setting values | Explanation
PRE COMP | Before compressor applied
POST COMP | After compressor applied

NOTE

When PRE COMP is selected, the playback signal will be inserted before the compressor.

When POST COMP is selected, the playback signal will be inserted after the compressor.

SD card settings

Checking the open space on SD cards

1. Open MENU > SD CARD > REMAIN.

This shows the open space on the card.

NOTE

The L-20 shows less than the actual open space in order to maintain space to prevent SD card writing performance from degrading.

Formatting SD cards

Format SD cards for use with the L-20.

1. Open MENU > SD CARD > FORMAT.

2. Use to select YES, and press .

NOTE

・Before using SD cards that have just been purchased or that have been formatted on a computer, they must be formatted by the L-20.

・Be aware that all data previously saved on the SD card will be deleted when it is formatted.

・Format an SD card before recording to it at 96 kHz.

Testing SD card performance

You can test whether SD cards can be used with the L-20.

A basic test can be done quickly, while a full test examines the entire SD card.

Conducting a quick test

1. Open MENU > SD CARD > PERFORMANCE TEST.

2. Turn to select QUICK TEST, and press .

3. Use to select YES, and press .

The card performance test will start. The test should take about 30 seconds.

The result of the test will be shown when it completes.

4. Press to stop the test.

NOTE

Even if a performance test result is "OK", there is no guarantee that writing errors will not occur. This information is just to provide guidance.

Conducting a full test

1. Open MENU > SD CARD > PERFORMANCE TEST.

2. Use to select FULL TEST, and press .

The amount of time required will be shown.

3. Use to select YES, and press .

The result of the test will be shown when it completes.

If the access rate MAX reaches 100%, the card will fail (NG).

4. Press to stop the test.

HINT

You can press to pause and resume a test.

NOTE

Even if a performance test result is "OK", there is no guarantee that writing errors will not occur. This information is just to provide guidance.

Making various settings

Setting the date and time

1. Select MENU > SYSTEM > DATE/TIME.

2. Setting the date and time

Move cursor or change value: Turn

Select item/confirm change: Press

3. Press .

The first time you turn the power on after purchase, you must set the date/time.

Setting the footswitch

If a footswitch (ZOOM FS01) is connected to the CONTROL IN jack, you can start/stop recorder playback punch in/out or mute/unmute the send effect by foot.

1. Open MENU > SYSTEM > CONTROL IN.

2. Turn to select the setting value, and press .

Setting values | Explanation
PLAY | Press the footswitch to start/stop playback. (Equivalent to .)
PUNCH I/O | Use to control manual punching in/out. (Equivalent to .)
EFX1 MUTE | Mute/unmute send effect 1.
EFX2 MUTE | Mute/unmute send effect 2.
EFX1&2 MUTE | Mute/unmute send effects 1 and 2.

Changing the sampling rate

The file format used when recording to the recorder depends on this setting.

Before changing the sampling rate, L-20 must be set to OFF.

1. Confirm that is set to OFF.

2. Change the position.

HINT

This can be set to 44.1 kHz, 48 kHz or 96 kHz.

NOTE

・Format an SD card before recording to it at 96 kHz. If you record without formatting first, skipping could occur.

・When 96 kHz is selected, some unit operations are limited. The limited functions are as follows.

　- SEND EFX 1/2: disabled

　- EQ: disabled

　- OVER DUB: disabled

　- Audio interface: disabled

　- MONITOR OUT: output signal same as MASTER only

3. Set to ON.

NOTE

・The sampling rate cannot be changed during operation.

・If a project is loaded that has a different sampling rate than the unit setting, recording and playback will not be possible.

Disabling the automatic power saving function

The power will automatically turn off if the L-20 is unused for 10 hours.

If you want the power to stay on always, disable the automatic power saving function.

1. While pressing and holding , set to ON.

2. Use to select OFF, and press .

NOTE

This setting is saved in the unit.

Adjusting the display contrast

1. Open MENU > SYSTEM > DISPLAY CONTRAST.

2. Turn to select the setting value, and press .

HINT

This can be set from 1 to 10.

Restoring settings to factory defaults

You can restore the factory default settings.

1. Open MENU > SYSTEM > FACTORY RESET.

2. Use to select YES, and press .

NOTE

This does not reset mixer settings. (→"Resetting mixer settings")

Checking the firmware versions.

The L-20 firmware versions can be viewed.

1. Open MENU > SYSTEM > FIRMWARE VERSION.

This shows the firmware versions.

Updating the firmware

The L-20 firmware can be updated to the latest versions.

1. Copy the firmware update file to the root directory on an SD card.

NOTE

Files for the latest firmware updates can be downloaded from the ZOOM website (www.zoom.co.jp).

2. Insert the SD card into the L-20.

3. While pressing , set to ON.

4. Press .

NOTE

During the firmware update, do not turn the power off or remove the SD card. Doing so could cause the L-20 to become unstartable.

5. After the firmware update completes, turn the off.

Control from an iPad

By connecting a BTA-1 or other ZOOM-specific wireless adapter (sold separately) and using the dedicated controller app, the L-20 can be operated from an iPad.

NOTE

・Before turning the L-20 on, connect the BTA-1 or other ZOOM-specific wireless adapter (sold separately).

・Download the dedicated app from the App Store.

Connecting with an iPad

Pairing beforehand is necessary to connect with an iPad.

1. While the L-20 is off, connect the BTA-1 or other ZOOM-specific wireless adapter (sold separately).

2. Turn the L-20 power on.

The L-20 will start in recording standby.

3. Launch the dedicated app on the iPad.

4. On the app settings screen, conduct connection.

HINT

For app setting procedures, see the manual for the app.

Troubleshooting

General

There is no sound or output is very quiet

・Check the speaker connections and volume settings on the speakers.

・Check instrument and mic connections.

・When using a condenser mic, turn on.

・Confirm that the SIG indicators are lit green.

・Confirm that is unlit.

・Raise all the channel faders and the master fader, and confirm that the level meters are lit.

・Confirm that the MASTER is unlit or lit red.

Recorded audio is too loud, too quiet or silent

・Adjust input gains and confirm that SIG indicators are lit green.

・When using a condenser mic, turn on.

・When recording to an SD card, confirm that is lit red.

Recording not possible

・When recording to an SD card, confirm that is lit red.

・Confirm that the SD card has open space.

・When recording to an SD card, confirm that the project is not protected (to prevent overwriting).

"Write Error" appears and recording properly is not possible./ Stopping recording takes an excessive amount of time.

・SD cards can become worn out. Speed can decrease after repeated writing and erasing.

・Formatting the card with this unit might improve this. (→"Formatting SD cards")

・If formatting an SD card does not improve this, we recommend replacing the card. Please check the list of cards that have been confirmed to work on the ZOOM website.

NOTE

This is not a guarantee of specific SD card recording performance for SDHC/SDXC cards that have been confirmed to work.

This list is provided as a guideline to help find suitable cards.

Playback sound cannot be heard or is quiet

・When playing data from an SD card, confirm that is lit green.

・Raise the faders on the playback channels, and confirm that the level meters are lit.

The sounds of devices connected to input jacks are distorted

・Confirm that the SIG indicators are not lighting red. If they are lighting, lower their input gains. You can also turn on.

・Confirm that level meters are not lighting to their highest levels. If a level meter is lighting to its highest level, lower its fader.

A send effect is not working

・Confirm that the EFX 1/2 RTN is unlit.

・Raise the EFX 1/2 RTN fader, and confirm that the EFX 1/2 RTN level meters are lit.

・Confirm the send amounts of the channels on which you want to use the effect.

There is no sound or output is very quiet from MONITOR OUT A-F

・Confirm the mixes of each output.

・Confirm that the output volume of each output is raised (MONITOR OUT A-F knobs).

・Confirm the settings of the MONITOR OUT A-F switches.

Audio interface

Cannot select or use the L-20 device

・Confirm that the L-20 is connected to the computer correctly.

・Confirm that is set to OFF on the L-20.

・Quit all the software that is using the L-20, and turn the L-20 off and on again.

・Reinstall the driver.

・Connect the L-20 directly to a USB port on the computer. Do not connect it through a USB hub.

Sound skips during playback or recording

・If you can adjust the audio buffer size of the software that you are using, increase the buffer size.

・Connect the L-20 directly to a USB port on the computer. Do not connect it through a USB hub.

・Turn the automatic sleep function and other computer power saving settings off.

Cannot play or record

・Confirm that the L-20 is connected to the computer correctly.

・Confirm that the Sound setting of the computer you are using is set to "ZOOM L-20".

・Confirm that L-20 is set for input and output in the software that you are using.

・Confirm that for channels 17/18 and for channels 19/20 are lit red, and that the level meters are lit.

・Quit all the software that is using the L-20, and disconnect and reconnect the USB cable connected to the L-20.

Specifications

[Number of input and output channels]

　Inputs

　　　Mono (MIC/LINE)

　　　　16

　　　Stereo (LINE)

　　　　2

　Outputs

　　　MASTER OUT

　　　　1

　　　MONITOR OUT

　　　　6

　　　PHONES

　　　　1

[Inputs]

　Mono (MIC/LINE)

　　　Type

　　　　XLR/TRS combo jacks (XLR: 2 HOT, TRS: TIP HOT)

　　　Input gain

　　　　PAD OFF: +16 - +60 dB

　　　　PAD ON: -10 - +34 dB

　　　　Hi-Z ON: +6 - +50 dB

　　　Input impedance

　　　　XLR: 3 kΩ

　　　　TRS: 10 kΩ/1 MΩ (when Hi-Z ON)

　　　Maximum input level

　　　　PAD OFF: 0 dBu (at 0 dBFS)　 PAD ON: +26 dBu (at 0 dBFS)

　　　Phantom power

　　　　+48 V

　Stereo (LINE)

　　　Type

　　　　TS phone/RCA pin (unbalanced) jacks

　　　Maximum input level

　　　　+14 dBu

[Outputs]

　MASTER OUT

　　　Type

　　　　XLR jacks (balanced)

　　　Maximum output level

　　　　+14.5 dBu

　　　Output impedance

　　　　100 Ω

　MONITOR OUT A-F (with balanced output) connected to monitor speakers

　　　Type

　　　　TRS phone jacks (balanced)

　　　Maximum output level

　　　　+14.5 dBu

　　　Output impedance

　　　　100 Ω

　MONITOR OUT A-F (with unbalanced output)connected to headphones

　　　Type

　　　　Standard stereo phone jacks

　　　Maximum output level

　　　　42 mW + 42 mW at 60 Ω

　　　Output impedance

　　　　100 Ω

　PHONES

　　　Type

　　　　Standard stereo phone jacks

　　　Maximum output level

　　　　42 mW + 42 mW at 60 Ω

　　　Output impedance

　　　　100 Ω

[Buses]

　MASTER

　　　　1

　MONITOR

　　　　6

　SEND EFX

　　　　2

[Channel strip]

　COMP

　LOW CUT

　　　　40-600 Hz, 12dB/OCT

　EQ

　　　　HIGH: 10 kHz, ±15 dB, shelving

　　　　MID: 100 Hz - 8 kHz, ±15 dB, peaking

　　　　LOW: 100 Hz, ±15 dB, shelving

　PHASE

[Level meters]

　12 segments

[Send effects]

　20 types

[Recorder]

　Maximum simultaneous recording tracks

　　　　22 at 44.1/48/96 kHz

　Maximum simultaneous playback tracks

　　　　20

　Recording format

　　　　WAV 44.1/48/96 kHz, 16/24-bit, mono/stereo

　Recording media

　　　　4GB-32GB SDHC cards, 64GB-512GB SDXC cards

[Audio interface]

　44.1/48 kHz

　　　Recording: 22 channels　Playback: 4 channels

　Bit depth

　　　　24-bit

　Interface

　　　　USB 2.0

[Card reader]

　Class

　　　　Mass storage USB 2.0 High Speed

[USB HOST]

　Class

　　　　USB 2.0 High Speed

[Sampling frequency]

　44.1/48/96 kHz

[Frequency characteristics]

　44.1 kHz: -1.0 dB, 20 Hz - 20 kHz

　96 kHz: -3.0 dB, 20 Hz - 40 kHz

[Equivalent input noise]

　Actual measurements: -128dB EIN (IHF-A) at +60dB/150Ω input

[Display]

　LCD with backlight (128×64 resolution)

[Power]

　AD-19 AC adapter (DC12V 2A)

[Power consumption]

　24 W maximum

[External dimensions]

　445 mm (W) × 388.4 mm (D) × 82.6 mm (H)

[Weight (main unit only)]

　3.71 kg

Send effect specifications

　Note: Delay effects that are tempo synchronized can be synchronized to the project tempo.

　To synchronize them, press the TEMPO button and set the tempo. Quarter notes will be synchronized to the tempo.

[EFX 1]

1 Hall 1

　Hall reverb with a bright tone

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

2 Hall 2

　Hall reverb with a long time for early reflections

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

3 Room 1

　Dense room reverb

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

4 Plate

　Plate reverb simulation

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

5 Church

　Reverb that simulates the sound of a church

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

6 DrumAmb

　Reverb that adds a natural ambience (air sound) to drums

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

7 GateRev

　Special reverb suited to percussive performances

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

8 Vocal 1

　Very useful effect that combines delay with hall reverb

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

9 Vocal 2

　Effect that combines delay with mono output reverb

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

10 Vocal 3

　Effect that combines delay suitable for ballads with plate reverb

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

[EFX 2]

1 Hall 3

　Hall reverb that simulates an arena-sized venue

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

2 Room 2

　Room reverb with coarse reflections

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

3 Spring

　Spring reverb simulation

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

4 Delay

　Digital delay with a clear tone

　Parameter knob 1:TIME

　Parameter knob 2:FEEDBACK

　Tempo synchronization:YES

5 Analog

　Warm analog delay simulation

　Parameter knob 1:TIME

　Parameter knob 2:FEEDBACK

　Tempo synchronization:

6 P-P Dly

　Effect that outputs delay sound alternately left and right

　Parameter knob 1:TIME

　Parameter knob 2:FEEDBACK

　Tempo synchronization:YES

7 Vocal 4

　Effect that combines delay suitable for rock with room reverb

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

8 Chorus 1

　Stereo chorus with a clear wide quality

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

9 Chorus 2

　Mono chorus with low variation useful for many applications

　Parameter knob 1:TONE

　Parameter knob 2:DECAY

10 Cho+Dly

　Effect that combines chorus and delay

　TParameter knob 1:TONE

　Parameter knob 2:DECAY

Mixer block diagram

NOTE

The graphic equalizer inserted on the MASTER OUT can only be controlled with the dedicated iPad app.

ZOOM CORPORATION

4-4-3 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062 Japan

http://www.zoom.co.jp

Z2I-3361-01A