I have a project idea which involves a bluetooth dongle that has to accept audio input streams from two different devices at the same time. I don't know if that's possible, so would it be possible to have a "slave" and "master" setup where if the "master" is playing audio then that "slave" input is silenced?
You can pair a master to 7 slaves in one piconet, but in a time interval a master is only connected to one slave. So actually you can not accept input streams at same time. But since Bluetooth does frequeny hopping very very fast, with a proper setting it can accept from one then accept from other then other again, but I don't know if it would be efficient in terms of quality since some of the data might be neglected.