Doepfer’s A-138U is a space-efficient, low cost 3:1 mixer module with dual channels. The output of the upper section is normalled to the first input of the lower section, enabling one to use the module as a 5:2, with the sum of all five signals being sent via the bottom output.
Mixer for audio signals, e.g. three VCOs preceding a VCF, when the amplifications are adjusted slightly different no signal extinction occurs during the beat of the VCOs
Mixer for control voltages (e.g. LFOs, envelope generators, random voltages)
Combined with an attenuator bank, a full function mixer is available
DC Coupled - works with audio rate and control signals