Electro-Harmonix 22500-Looper Datasheet
WARNING:
Your
22500
comes equipped with an Electro
-
Harmonix 9.6
VDC-
22500
Dual Stereo Looper
Congratulations on your purchase of the Electro-Harmonix 22500 Dual
Stereo Looper. Although the 22500 has a compact footprint it is loaded
with numerous powerful features, including:
• Dual Stereo Loops with either independent or locked loop lengths
• Sequential Looping enables verse/chorus switching
• Parallel Looping allows simultaneous playback of two loops
• Selectable Microphone input with adjustable gain and Phantom Power
• Reverse and Octave functions at the touch of a button
• Undo-Redo your last overdub
• Overdub with adjustable feedback amount
• Create loop lengths that are completely free-form, locked to each other
or quantized to internal rhythms
• 100 Loop Banks per SD Card, each bank containing up to 2 loops
• Rhythm Guide with 16 built-in drum loops
• Footswitch selectable for All Stop, Tap-Tempo, or Rhythm Start/Stop
• USB Port enables backup/restore to PC or MAC
• Includes high capacity SD Memory Card for up to 12 hours of loop time
• Optional external Bank-Up/Down Foot Controller (sold separately)
• 9.6VDC/500mA power supply included
500mA power supply. The 22500 requires 240mA at 9VDC with a center negative
plug and does not accept batteries. Using the wrong adapter may damage your
unit and void the warranty. Please do not exceed 10.5VDC on the power plug.
7
22500 QUICK START GUIDE
MODES − Selecting / Types / Use
MODE SELECTION & KNOB:
• Press and release the MODE knob
to select or deselect modes.
• When a particular mode LED is lit
solid, the mode is selected. Turn
MODE to adjust the value seen on
the display.
• If a mode LED is blinking, no mode
is selected. Turn the MODE knob to
scroll through all the modes.
• When you land on the MODE you
want to adjust, press and release the
MODE knob to enter into the mode.
The selected LED goes solid.
• At this point you can turn the MODE
knob to adjust its value. After doing
so, press and release the MODE
knob to exit out of the mode. The
selected mode LED blinks.
BANK:
BANK mode allows you to select the
current loop bank. Each SD Card can
hold up to 100 banks, numbered 00
to 99.
LOOP:
LOOP mode is where you change
settings for Loop Lock/Freeform,
Loop Lock Multiply, Quantize,
Parallel/Sequential, and 1-Shot.
See pages - for an in-depth
explanation of modes.
16
23
OVERDUB:
Very much like a Feedback control on
a delay effect, the OVERDUB value
sets the loop audio volume loss for
each pass while overdubbing. Set to
100 so the loop never loses volume.
TRIGGER:
Trigger the start of loop recording
automatically when you start playing
your instrument. Use TRIGGER
mode to set the threshold level. As
the Trigger threshold is set higher,
less signal volume is required to
trigger loop recording.
R TEMPO:
R(hythm) TEMPO mode displays and
allows adjustment to the tempo. The
displayed tempo is in BPM and
represents the current tempo for
Loops A and B and the Rhythm loop.
R TYPE:
R(hythm) TYPE mode displays and
allows you to select a Rhythm. The
22500 comes supplied with 16
Rhythms from the factory. You may
also add your own Rhythm loops, see
page for more information.
26
R LEVEL:
R(hythm) LEVEL mode sets the
volume of the Rhythm loop. The
range is 0 to 100.
R LEVEL has a second page which
displays “COPY”. COPY mode
initiates the copy of the factory
default rhythms to the SD Card.
ERASE:
ERASE mode erases either Loop A or
Loop B or both loops simultaneously.
2
Recording / Playing / Overdubbing Loops
LOOP A First:
Even though the loops may be completely independent in
Freeform mode, we recommend you always record Loop A
first. When set to Loop-Lock mode, the 22500 requires Loop A
to be recorded first since Loop B’s length is automacally set
by Loop A.
START RECORDING - No Loop in Memory:
NON QUANTIZE MODE:
1. Set LOOP Mode to F nP.
2. Press LOOP A or B’s FSW once to begin recording loop
immediately. REC LED lights.
4-BEAT QUANTIZE MODES:
1. Set LOOP Mode to F 4P. Each bar is 4 beats.
2. Ensure RHYTHM buon is lit.
3. Press STOP/TAP FSW to start Rhythm loop.
4. Press LOOP A’s FSW once. Recording begins on the
following beat 1. REC LED lights.
END RECORDING / SET LOOP LENGTH:
NON QUANTIZE MODE: Press LOOP A or B’s FSW once to end
recording, set the loop length, and begin playback. PLAY LED
lights solid, MEM LED blinks.
4-BEAT QUANTIZE MODE: Press LOOP A or B’s FSW once to
enter Record-End mode. The loop will stop recording when it
reaches the end of the current bar. PLAY LED lights solid,
MEM LED blinks.
LOOP FSW ACTIONS
Press Once
RECORD
Press Once
END RECORD,
START PLAYBACK
Press Once
OVERDUB
The loop immediately begins playback aer the recording
ends. Excepon: in 1-Shot mode, the loop does not play back
immediately. You must press Loop’s FSW to iniate play back.
LOOP PLAY/STOP:
PLAY: If a loop is stopped, press its FSW once to start
playback. PLAY LED lights solid.
STOP: If the loop is playing, overdubbing, or recording, press
its FSW twice to stop the loop. MEM LED blinks or is lit solid.
OVERDUB START/STOP:
OVERDUB START: While a loop is playing, press the loop’s
FSW once to enter overdub. REC, PLAY LEDs lit solid. MEM
LED blinks or is lit solid. If blinking, undo may be performed.
OVERDUB STOP: While a loop is overdubbing, press its FSW
once to end overdub; the loop connues playback. PLAY LED
lights solid, MEM LED blinks indicang undo is available.
3
Press Once
END OVERDUB,
CONTINUE PLAYBACK
Press Twice
STOP PLAYBACK
LOOP Mode Explanation
Page 1: Quantize, Parallel/Sequential,
Loop Lock Settings
The settings in LOOP mode dictate how loops are recorded, played back, and interact with each other. In this
mode the following settings can be adjusted:
• Lock Loop B’s length to Loop A
• Play and record the loops in parallel or sequentially
• Quantize loops to exact bar lengths, synchronized to the 22500’s Rhythm
Digit 3:
n: Non-Quantize mode, Quantize is off
2: Quantize to 2/4 bar lengths, each bar 2 beats
3: Quantize to 3/4 bar lengths, each bar 3 beats
Digit 1:
L: Loop-Lock Mode
F: Freeform Loop Mode
4: Quantize to 4/4 bar lengths, each bar 4 beats
6: Quantize to 6/8 bar lengths, each bar 6 beats
b: Quantize to the beat, this is an expert setting
1
/
8th
L24P
Digit 2:
Loop Lock Multiple: When
set to Loop Lock Mode,
digit 2 automatically sets the
length of Loop B as a multiple
of Loop A, such as .5x, 1x, 2x
up to 9x. When set to U, the
multiple can be any whole number
set by the user when creating LOOP B.
Digit 2 is blank when set to Freeform mode.
1-Shot mode: In 1-shot mode the loop audio is played one time
through and then stops; the loop does not continue to play.
Page 2 - Loop A 1-Shot Page 3 - Loop B 1-Shot
A1of
A1oF: 1-Shot mode is OFF for LOOP A
A1on
Digit 4:
P: Parallel Mode – the loops
can play simultaneously, in
parallel with each other.
S: Sequential Mode – only
one loop plays at a time.
b1of
b1oF: 1-Shot mode is OFF for LOOP B
b1on
A1on: 1-Shot mode is ON for LOOP A
b1on: 1-Shot mode is ON for LOOP B
4
Parallel Loop Recording/Playback Examples
Freeform Mode
In Parallel mode, one or both loops play simultaneously, allowing
you to use the 22500 like a 2 track recorder or two independent
loopers. To follow these examples, please set LOOP Mode to
the settings shown at the start of each section.
FREEFORM
f nP
• Loops play back simultaneously.
• Each loop may be independently
started or stopped.
• Loop B’s length is independent of
Loop A.
• Either Loop A or B may be recorded
first but default tempo is set by A.
RECORD LOOP A:
1. Press Loop A’s FSW to begin rec-
ording Loop A immediately.
2. Press Loop A’s FSW again to end
recording on Loop A and to set its
length. Loop A will now start playing
back. You could also end Loop A by
pressing Loop B’s FSW to immediately end Loop A and begin recording
Loop B.
3. While Loop A is playing, you could
overdub onto Loop A by pressing its
FSW, stop Loop A by double-tapping
its FSW, or just let it play.
PARALLEL—
QUANTIZE OFF:
FREEFORM
f 4P
• Similar to Freeform mode with
Quantize off except Loop A and B’s
lengths are quantized to the nearest
bar. Loop A’s initial recording tempo
establishes the default tempo for
both loops.
RECORD LOOP A:
1. Ensure the RHYTHM button is lit.
Start the Rhythm loop by pressing the
STOP/TAP FSW.
2. Press Loop A’s FSW. Loop A begins
recording on beat 1 of the next bar.
3. Press Loop A’s FSW to end recording. The 22500 will stop recording on
beat 1 of the following bar.
NOTE: Pressing Loop A’s FSW before
the Rhythm loop is playing puts Loop
A in Record-Ready mode. It waits for
you to start the Rhythm loop. Once
you start the Rhythm, Loop A begins
recording on beat 1 of the second bar.
PARALLEL—
QUANTIZE ON:
RECORD LOOP B:
4. Whether Loop A is playing, over-
dubbing, recording or stopped, press
Loop B’s FSW to immediately begin
recording Loop B. If you press Loop
B’s FSW while Loop A is making its
initial recording, Loop A’s length is set
at the moment you press B’s FSW.
5. Press Loop B’s FSW to end recording and to set Loop B’s length.
Loop B will now start playing back.
6. At this point, you could overdub
onto Loop B by pressing its FSW, stop
Loop B by double-tapping its FSW, or
just let it play.
RECORD LOOP B:
4. While Loop A is playing, overdub-
bing, recording or stopped, press
Loop B’s FSW to put B into RecordReady mode; Loop B’s REC LED
blinks. Loop B begins recording on
the next bar’s beat 1. If Loop A is
recording its initial loop when you
press B’s FSW, Loop A continues to
record until the current bar finishes
recording.
5. Press Loop B’s FSW to end recording. Loop B continues recording until
the current bar finishes. Loop B then
begins playing back automatically.
5
Parallel Loop Recording/Playback Examples
Loop Lock Mode
Continuing examples of Parallel Loop recording and playback,
this time with Loop B’s length locked to Loop A.
LOOP-LOCK
L2nP
• Loop A’s length automatically sets
the length for Loop B.
• Loop A must be recorded first.
• The second digit in Loop Mode sets
the loop multiple for Loop B.
RECORD LOOP A:
1. Record Loop A as done in
Freeform—Quantize Off, on the
previous page.
RECORD LOOP B:
2. Loop B’s record start depends on
the current state of Loop A. If Loop A
is playing or overdubbing, pressing
Loop B’s FSW puts Loop B into
Record-Ready mode; Loop B begins
recording at Loop A’s cycle point. If
Loop A is recording its initial loop or
stopped, pressing Loop B’s FSW
immediately begins recording Loop B.
3. Loop B’s length is automatically
determined by Loop A’s length multiplied by the Loop Multiple setting, the
second digit in LOOP mode. For
example, if Loop A is 3 seconds and
the Loop Multiple is set to 2, Loop B’s
length will be 6 seconds. Loop B
automatically stops recording when it
reaches the correct loop length. Both
Loop B’s REC and PLAY LEDs blink
when it is about to stop recording.
PLAYING LOOPs A & B:
4. If you start playing one of the loops,
the other loop—though remaining
silent—will follow along. When you
start the second loop, it begins
playing immediately in sync with the
first loop, as if the second loop was
unmuted.
PARALLEL—
QUANTIZE OFF:
LOOP-LOCK
L24P
• Similar to Loop-Lock mode with
Quantize Off except Loop A’s length
is quantized to the nearest bar.
Again, Loop A must be recorded first.
RECORD LOOP A:
1. Ensure the RHYTHM button is lit.
Start the Rhythm Loop by pressing
the STOP/TAP FSW.
2. Record Loop A as done in
Freeform—Quantize On, on the
previous page.
RECORD LOOP B:
3. While Loop A is playing, overdub-
bing, recording or stopped, press
Loop B’s FSW to put B into recordready mode; Loop B’s REC LED
blinks. Loop B begins recording on
the next bar’s beat 1. If Loop A is
recording its initial loop when you
press B’s FSW, Loop A continues to
record until the current bar finishes.
4. Loop B’s length is automatically
determined by Loop A’s length
multiplied by the Loop Multiple setting,
the second digit in LOOP mode. For
example, if Loop A is 2 bars and the
Loop Multiple is set to 2, Loop B’s
length will be 4 bars. Loop B automatically stops recording when it reaches
the correct loop length.
PLAYING LOOPs A & B:
5. If the Rhythm loop is playing, Loops
A and B start playback on the first
beat 1 after pressing their respective
footswitches. If no Rhythm loop is
playing then Loop A and B play back
in the same way as with Quantize Off.
PARALLEL—
QUANTIZE ON:
6
Sequential Loop Recording/Playback Examples
Freeform & Loop-Lock Mode
In Sequential mode, only one loop plays at a time, allowing you to
switch back and forth between the 2 loops either immediately or
when one of the loops comes to its end. To follow these examples,
please set LOOP Mode to the settings at the start of each section.
FREEFORM
f nS
• Loops are switched back and forth
immediately upon pressing their
footswitches.
• Either Loop A or B may be recorded
first but A sets Bank’s default tempo.
RECORD LOOP A:
1. Press Loop A’s FSW to begin
recording Loop A immediately.
2. Press Loop A’s FSW again to end
recording on Loop A and to set its
length. Loop A starts playing back.
3. While Loop A plays, you could
overdub, stop, or continue playback.
RECORD LOOP B:
4. Whether Loop A is playing, overdubbing, recording or stopped, press
Loop B’s FSW to immediately stop
Loop A and begin recording Loop B. If
you press Loop B’s FSW while Loop A
is making its initial recording, Loop A’s
length will be set at the time you press
the Loop B FSW.
5. Press Loop B’s FSW to end recording and to set Loop B’s length. Loop B
starts playback.
BACK AND FORTH BETWEEN
LOOPS A & B:
6. Toggle back and forth between the
two loops by pressing the FSW of the
loop that is currently not playing or
overdubbing.
7. Let’s say both loops contain audio
and at the moment Loop B is playing.
If you press Loop A’s FSW, Loop B
immediately stops playback and Loop
A starts.
SEQUENTIAL—
QUANTIZE OFF:
LOOP-LOCK
L34S
• Loops change over when the
currently playing loop ends.
• Loop A must be recorded first.
• Loop A’s length is quantized to the
nearest bar.
• Loop B’s length is a multiple of Loop A.
RECORD LOOP A:
1. Ensure the Rhythm loop is playing.
2. Record Loop A as done in
Freeform—Quantize On, 2 pages back.
RECORD LOOP B:
3. While Loop A is playing or overdubbing, press Loop B’s FSW to put B into
Record-Ready mode; Loop B’s REC
LED blinks. When Loop A comes to the
end of its loop, Loop B begins recording
immediately. Loop A stops playback.
4. Loop B’s length is automatically
determined by Loop A’s length multiplied
by the Loop Multiple setting, the second
digit in LOOP mode. For example, if
Loop A is 2 bars and the Loop Multiple
is set to 3, Loop B’s length will be 6
bars. Loop B automatically stops
recording when it reaches the correct
loop length. Both Loop B’s REC and
PLAY LEDs blink when it is about to
stop recording.
BACK AND FORTH BETWEEN
LOOPS A & B:
5. If Loop A is playing or overdubbing
and you press Loop B’s FSW, Loop B
enters Play-Ready mode (B’s PLAY
LED blinks), and waits for Loop A to end
before changing over to Loop B. Same
for going from Loop B to Loop A.
SEQUENTIAL—
QUANTIZE ON:
NOTE: Freeform Sequential can also
be performed with Quantize on.
NOTE: Loop-Lock Sequential can also
be performed with Quantize off.
7
22500 USER REFERENCE MANUAL
- CONTROLS & INDICATORS -
LEFT INPUT TOGGLE SWITCH (MIC/INST) – The left channel has two input
connector choices: set LEFT INPUT to the down position for the ¼” instrument
input jack or set to the up position for the XLR microphone input.
MIC TRIM Knob – The MIC TRIM knob allows you to fine tune the gain of the
XLR MIC input jack. The maximum gain available at the MIC TRIM knob is
+27dB. Normally it is best to start with MIC TRIM at its maximum setting.
PHANTOM POWER TOGGLE SWITCH (ON/OFF) – when set to the upper,
ON position, phantom power is applied to the XLR MIC input jack. Set to the
down position to disable phantom power on the microphone input. CAUTION:
please ensure your microphone can withstand phantom power (+45VDC) before
setting this switch to the ON position. In particular, phantom power is known to
possibly damage ribbon microphones.
INPUT GAIN Knob – The INPUT GAIN knob sets the overall gain for both the
LEFT and RIGHT inputs equally. INPUT GAIN also sets the output level of your
dry signal at the output jacks. Ideally you would turn up INPUT GAIN until you
see the CLIP LEDs light briefly and then reduce the INPUT GAIN slightly. If you
need more output level for the dry signal do not be afraid to turn up the INPUT
GAIN knob. The maximum gain available at the INPUT GAIN knob is +14dB.
Unity gain for the ¼” inputs is located at about 11 o’clock on the INPUT GAIN
knob.
When the LEFT INPUT switch is set to MIC, the MIC TRIM knob on the rear panel
first sets the microphone’s gain, and then the INPUT GAIN knob further adjusts
the gain. If you attach both a microphone and a Right input, use MIC TRIM to
match the microphone’s level to the Right input. Then use INPUT GAIN to set the
input volume for both channels.
CLIP L & R LEDs – When an input signal’s amplitude exceeds the maximum
input level of the 22500’s A/D converter, the channel’s respective CLIP LED
briefly lights up. Aim to adjust the INPUT GAIN knob so that these LEDs barely
ever light. However it is also not wrong if they light consistently. Let your ears
decide if there is audible distortion. If distortion is present and it doesn’t sound
right, turn down the INPUT GAIN knob.
LOOP A & LOOP B Knobs – These two knobs set the output volume for their
respective loops. The LOOP A knob adjusts the output volume for Loop A at all
times and the LOOP B knob adjusts the output volume for Loop B at all times.
These knobs are always live and are not saved with loop banks.
REC LEDs for LOOP A & LOOP B
MEM LEDs, give a visual indication of each loop’s current activity.
– These red LEDs, along with the PLAY and
8
When the REC LED is lit solid but PLAY and MEM are not lit: the respective loop
is currently recording its initial loop.
When the REC LED is lit solid while also PLAY and MEM are active: the loop is
currently overdubbing onto an established loop. Only one loop can record or
overdub at a time; Loop A and Loop B cannot simultaneously record or overdub.
One loop can record or overdub while the other plays though.
A blinking REC LED indicates one of two things:
1) You pressed a loop’s footswitch to begin recording a new loop and the loop is
not yet recording but is in Record-Ready mode. Record-Ready occurs if you have
set a Trigger threshold (see TRIGGER mode, page 21) for the loop and now the
22500 is waiting for an audio signal to exceed the threshold at which point it will
begin recording. Record-Ready also occurs when a Quantize mode (see
QUANTIZE, page 19) is enabled: after pressing a loop’s FSW to begin recording,
the 22500 waits for the next bar’s beat 1 or the next beat of the Rhythm loop
and then automatically starts recording on the beat.
2) You are about to finish recording an initial loop. When recording a quantized
loop – during the intended last bar of the loop – press the loop FSW to enter
Record-End mode. The 22500 will record out the rest of the bar while the REC
LED blinks. If you have Loop-Lock mode enabled, when recording Loop B, Loop
B’s REC LED automatically blinks to indicate it is about to stop recording Loop B.
MEM LEDs for LOOP A & LOOP B – If these orange LEDs are lit solid or
blinking, it indicates that a loop is currently in memory. A blinking MEM LED
indicates that undo or redo is available for the loop. The table below describes
the MEM LEDs four different states:
MEM LED STATE WHAT IT MEANS
OFF The respective loop is empty; it has no audio
in memory.
ON The respective loop contains audio that may
be played or overdubbed but cannot perform
Undo or Redo.
BLINKING
Rapidly
BLINKING at
Medium Pace
The respective loop contains audio and you
can perform an Undo function that will erase
the entire loop permanently. This state occurs
right after recording an initial loop and is a
quick way to erase the loop if you are not
satisfied with it.
The respective loop contains audio and an
overdub was recently performed. Both Undo
and Redo are available to remove or restore
the last overdub layer.
9
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