Module A-138n is a simple four channel mixer, which can be used with either control voltages or audio signals.
Each of the four inputs has an attenuator available.
The output is twice available (two sockets, hard-wired like a multiple).
3U Eurorack module, 4 HP wide, 20mm in depth
Power consumption: 10 mA at +12 V and 10 mA at -12 V