Audio switching
More on this, the bike already has a stereo and CB/intercom. When the CB or intercom is active it mutes the stereo. For whatever reason they chose to do this the signal coming to the headset is mono, so that eases that problem. My want is to add the ham radio and have a harness to plug into the existing harness(easy part, this I already have) and mute the stereo when ham radio is active. I have found an audio "switch" IC in Mouser "NJM 2520D" , it is a 2 input and 1 output IC but I cnnot find a pinout on it yet.
Edit; Pinout found, IC is obsolete, no stock in USA!