Help making automatic analog audio input switch

Here's the situation

  • I have two analog audio devices that I never use at the same time.
  • I have a receiver that i want to be able to leave on a single input all the time

I want to build a device that I can plug both audio devices into, have that device listen to the incoming audio signal, and then output whichever has audio at a given time.

  • Is arduino the right choice for this?
  • What would I need to listen to presence of an analog audio signal on two separate sources?
  • Any other thoughts?

Thanks! You help is much appreciated.

s arduino the right choice for this?

A Uno or Nano is as good as anything else for this project, in fact you probably don't need a processor at all.

What would I need to listen to presence of an analog audio signal on two separate sources?
Any other thoughts?

Just two envelope detectors. Envelope detector - Wikipedia

Any other thoughts?

Why not just use an op-amp mixer for these two channels. As only one is on at a time it is no problem to just mix the two together and feed it to your single channel amplifier. No Arduinos need get harmed.

This is a really cool idea!!! I'd like to see it.....

+1 on Mike's last line- you can do this all analog.

doogin:
Here's the situation

  • I have two analog audio devices that I never use at the same time.
  • I have a receiver that i want to be able to leave on a single input all the time

But haven't told us what they actually are - links to datasheets/product pages please...