Has anyone created or found a circuit/product that would do this….

Say you have a second head unit, iPod or navigation device (whatever) and you want to be able to activate this second unit and have the empeg automatically switch to AUX when audio from this second device is present. Then (optionally) switch back to the empeg once the audio is no longer present. The second device does NOT have a mute out line.


I’m thinking this could be done as follows…


AUX Audio Source ---- Device?----------------- AUX Audio In --------
......................................... | .............................................. EMPEG
............................................. -------------------- Mute Line --------


The empeg mute line could be toggled high or low by the device which through Hijack’s extmute_on=xxxxxxxx option could then turn on or off the AUX source on the empeg.

The only connection needed to the AUX source would be to hook up to the Audio out.


I’ve been looking at mic. audio switches that do this sort of thing but have not found one that would do the job 100%. I’ve also thought of designing a circuit using perhaps an op amp and a 555 timer.

Anyone have any ideas or suggestions?

thanks