How would I go about streaming audio FROM an iOS device to another device like a Mac or another iOS device? I can only find solutions like AirPlay on Google and nothing abou
I think a good start would be to understand the old example for CoreAudio: SpeakHere (it records and plays sounds using low level C APIs. CoreAudio is one of the ascendants of AVFoundation)
As @DexterW said you will need knowledge of AudioQueue, etc.
After that you can start thinking in the servers/packets to stream to :)
Hope it helps.