Combine stereo and mono audio signals with the intellijel Mixup, an 8-channel chainable mono/stereo audio utility mixer in Eurorack format. Mixup has 2 mono and 2 stereo inputs 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 (left and right) is a dual-channel stereo input with a shared mute and level control, and input 4 is an auxiliary unity-gain, nonmutable stereo input.