I have a project I've been scratching my head over for a few days.
I work a lot with 2-way radios and like to listen to music while I'm doing it. I wear an earpiece for the 2 way radio.
I want to build a circuit box I can plug the audio for the 2-way radio into along with the audio from an MP3 player and have them coming out of the same earpiece but the 2 way radio to cut out the MP3 signal when someone talks over the radio to me so I can hear it.
I thought a resistor on the radio wire but that doesn't seem to help with the problem that I have I need the music to cut out when the radio signal comes through and come back once the radio signal has stopped.
Ideally would also like to add vol controls (variable resistors) for both on the box
Anyone got any ideas or probably something horrendously simple I haven't thought of/overlooked would be greatly appreciated.