Audio Interface II Manual


The Audio Interface II is designed to interface your modular system with line-level equipment using balanced 1/4″ TRS cables.


See the Module Installation Guide for instructions on installing the module in your Eurorack modular system.

Front Panel



    These knobs set the gain of the signal coming in to the modular via the BAL IN L/R jacks. The knob range is from -∞ (no signal) to +6 dB. The signal levels are indicated on the meters above the OUT L/R jacks.
    These knobs set the gain of the signal leaving the modular via the BAL OUT L/R jacks. The knob range is from -∞ (no signal) to +6 dB. The signal levels are indicated on the meters above the IN L/R jacks.

Inputs & Outputs

  1. OUT L/R
    These jacks are the modular level outputs of the signals coming in to the system via the corresponding channel of the BAL IN L/R jacks. The signals are boosted to modular levels according to the INPUT GAIN knobs.
  2. BAL IN L/R
    These jacks bring signals in to your modular system from the outside world to their corresponding OUT L/R jacks. Connect a 1/4″ balanced TRS cable. from the output of your other synthesizers, effects pedals, audio interfaces, etc. to these jacks.
  3. IN L/R
    These jacks are the modular level inputs that send your modular’s audio to the outside world. A modular audio signal connected to these jacks will appear at line level on the corresponding BAL OUT jacks, with gain controlled by the OUTPUT GAIN knobs.
  4. BAL OUT L/R
    These jacks carry signals from your modular to your other audio equipment. Use a 1/4″ balanced TRS cable to connect each one to an input of an effects pedal, audio interface, tape recorder, etc.

Patch Notes

  • Even though the channels are labelled “L” and “R” they don’t need to be used for stereo sources. You can use them for completely different purposes.
  • Process your modular via external effects: connect a module audio output to IN L. Connect BAL OUT L to the effect input. Connect the effect output to BAL IN L. Connect OUT L to another point in your patch.