iphone - Recording from Built-In Mic when Playing through Bluetooth in iOS -

is possible receive audio input iphone's built-in microphone, , play audio through bluetooth headset, @ same time?

my goal use built-in microphone input device, if output device headset, because built-in microphone more convenient in use cases.

i know how achieve goal when output device wired headset, 1 comes bundled iphone. plug wired headset in, , call following method:

- (void)selectbuiltinmicrophone {     avaudiosession *session = [avaudiosession sharedinstance];     (avaudiosessionportdescription *port in session.availableinputs)         if ([port.porttype isequaltostring:avaudiosessionportbuiltinmic]) {             nserror *error;             [session setpreferredinput:port error:&error];             break;         } } 

by calling above method, input device switched wired headset's microphone iphone's built-in microphone, while output device remains unaffected, iphone record built-in microphone , play through wired headset. expect.

the problem is, method not work when headset bluetooth one. if connect bluetooth headset iphone, call above method, built-in microphone becomes input device, great, output device changed iphone's receiver, bad.

it seems input , output of bluetooth headset locked together: either use both of them, or use none of them. goal impossible? or there exists way overcome apparent limitation?

it not possible receive audio input iphone's built-in microphone, , play audio through bluetooth headset, @ same time

1. there prevention can use walkie-talkie .
2. you have create 2 sessions . means while recording audio have enable audio session recordandplay.
3. while playing have set option audiosession (allowingbluetooth) .
4. while recording have set recordandplay.