Here is a multi channel audio mixer circuit based on 2N3819 n-channel JFET. It mixes as many as inputs into one channel. The design seen in the diagram is for only two channels (stereo into mono) but ...

Getting an audio mixer can take your recordings to a new level. From controlling so many aspects of your voice or instrument, and allowing for multiple users to record at once, buying the right mixer ...

I have a 7.1 USB sound card from Startech with 3 discrete 2ch outputs. It's a Startech ICUSBAUDIO7D. It uses a C-Media CM6206 chipset. I have kind of a weird intended use case for it and I don't know ...