Table of Contents
Setting up your Listen IO
1. Power off your Eurorack system.
2. Connect the free end of the included power cable to a 16-pin Eurorack
power header on your power supply distribution system. The red stripe
should match the white line or -12V marking on the power distribution
board. The other end of the power cable is a 10-pin connector which
should already be connected to the
Listen IO
with the red stripe on the
power cable orientated towards the bottom of the module.
Note: The
Listen
IO
is reverse-polarity protected, but incorrectly connecting any
module can damage any other module on the power bus.
3. Using the included screws, securely attach the
Listen IO
to the rails of
your case.
4. Power on your Eurorack system.
Line to Modular Section
The top half of the
Listen IO
converts low level signals such as line, instrument, or
microphone to modular level. There are two independent channels which share a common
Gain
knob.
Line In jacks
The two
Line In
jacks accept a wide range of signals; any guitar, effect pedal, synthesizer,
keyboard, musical toy, etc. can safely be plugged into these jacks. Most microphones will
also work, with the exception of mics that require power to be delivered over the cable
(Phantom-powered and electret mics). These jacks are mono. If you have a stereo signal,
patch the left channel into the left jack and the right channel into the right jack.
Gain knob
The
Gain
knob controls how much the
Line In
signal is boosted. Although the signal paths of
the left and right channels are separate, this knob controls both channels. The gain can range
from negative infinity (muted) to about +30dB (which is about a voltage gain of 30).
LED bar graph
The LED bar graph displays the level of the signal after the gain is applied. It also shows if
there is any clipping. The more lights that are on and the brighter they are, the louder the
signal. If the top light flashes red, then the signal is clipping. Adjust the
Gain
knob down until
the red light stays off to avoid clipping. It’s perfectly safe to clip and even overdrive the signal
for a distortion effect if you wish.
Mod Out jacks
The two
Mod Out
jacks output the boosted signal. The left jack is the output for the boosted
signal of the left
Line In
jack, and the right jack is the output for the boosted signal of the
right
Line In
jack. These jacks are mono. Typically, you would patch these to a Eurorack
module.
Setting up your Listen IO
2
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Line to Modular Section
2
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Modular to Line Section
3
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Electrical and Mechanical Specifications
4
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