Swiss Army Mixer Kit

Noise Reap's Swiss Army Mixer is a DC Coupled Eurorack Mixer.

This DIY Eurorack synth module is a full kit in the Eurorack format.

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DC coupled Inputs 1-4 are summed and sent to the mix out. If a cable is plugged into outs 1-3, that respective channel will be pulled from the mix and become buffered attenuator.

There are three differential amplifiers outputs at the bottom of the module. A simple formula for the differential outputs is this: [diff output] = [ input 1 voltage ] + [ – input 2 voltage ]. Notice that the inputs are added together but the second input is also inverted. As an example, a 5 volt gate at both inputs 1 & 2 will equal 0 volts out of the diff output. Diff 3-4 works the same way, with input 4 being the inverted input. The diff outputs can also be used as simple inverters for channels 2 & 4.

The “diff-diff” is a differential amplifier for the two diff outputs (diff 1-2 is the inverted input to the diff-diff).

Specs & Downloads

Specs & Downloads

Manufacturer Noise Reap
HP 8
Depth No
+12V 20mA
-12V 20mA
+5V No
Additional Resources No


Customer Reviews (1)

Just bought one of these and I am very disappointed to discover that this kit requires SMD Soldering. I have ruined my build and all I wanted was a simple mixer for my rack... I would not recommend this kit unless you have experience soldering teeny tiny ICs and resistors. : / (Posted on 12/19/2016)

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