Module is a 1U tile
This Module is currently available.
mini mixer
Mixy is simple mixer to sum your signals in your 1U row. Since it is DC coupled, you can mix audio or fixe signals
Mini and usefull:
mix your signal: the 3 first inputs are attenuated, the 4th input is summed without attenuation.
connect it: you can connect the mixy to the bye bye module with it's back header.
These merchants probably sell this module. Huh?
Alyseum Q-MIXI Input Expander for Q-MIX