The 4 Channel Mixer is a basic DC coupled mixer with 4 inputs and 4 attenuators. DC coupled means that it will accept both DC and AC (Audio) signals. As with all Hungry Robot "Modular Boxes" the 4 Channel Mixer can be powered with a simple 9V DC, Negative Center power supply.
IN (x4): Patch in any audio or CV signal to any of the 4 inputs. (NOTE: Avoid mixing CV and Audio)
OUT: This output is the sum of the four channels
LEVEL (x4): Each input has its own attenuator that allow you to bring down the level of the inputs