Mixup is a versatile, expandable audio mixer for eurorack format. It has eight inputs (6 on the front panel)  and two outputs. Inputs 1 and 2 are single-channel mono inputs, each with its own mute switch and level control; Input 3 is a dual-channel stereo input with a shared mute and level control; and input 4 is an auxiliary unity-gain, non-mutable stereo input.More Info: Mixup