Behringer Four Play, 4-Channel VCA And Mixer, Per channel: Level control, boost switch (+6 dB), CV attenuator and adjustable characteristics (linear / exponential), Audio and CV inputs normalised to the in what follows channel, Audio output per channel, The output of channel 4 can be used as a sum output, Power requirement: 100 mA (+12 V) / 100 mA (-12 V), Width: 12 TE, Depth: 41.3 mm