Tom Evans Modular 4 channel stereo input mixer.
Mix together 4 stereo channels. DC coupled for audio or CV signals.
On the back of the module is a chaining input and output. Use a 3 pin cable to send the output of one to another without using an extra channel.
Available at Patchwerks
https://patchwerks.com/collections/used/products/consignment-tom-evan-stereo-mixer
Available as an assembled Module and as a DIY project.
This Module is currently available.
$60