Audio Priority Switching Circuit. Can not find a schematic that will fit my need
Here is the need.
2 audio lines coming in. 1 is on all the time. when audio is sensed on line 2, it will reduce (or turn off) line 1 allowing line 2 to take priority. Then when line 2 stops, (mobile radio traffic) it switches back to line 1.
Small as possible (and yet I can still solder together)
runs on 5-9V DC
Adjustable gain on inputs
Sensitivity adjustment on "switching" function
Of the hundreds of circuits I have looked at, It seems to be a fairly simple task with a FET ...... I can build it, but the design portion is a to much math for me..lol
A 3 audio switching circut would be AWESOME!!!
Anyone seen anything out there that will help me in my search???