Two-channel recording on the iPhone/iPad: headset + built-in mic
audio-recording, core-audio, ios, ipad, iphone
Solution
The OS currently only allows an app to connect to one audio source route at a time. The only way to record 2-channels on a stock iOS device is by using an Apple USB to Lightning connector (Camera Connection kit on older models) with a standard USB stereo ADC or an audio mixing panel which has multiple mic inputs.
Problem
For an app, we have a requirement to record from two different audio sources. One mic is a special (throat) mic and it comes with the same connector that the iPhone headset with mic uses. On a second channel, we would like to record the ambient sounds and the best thing would be if we could just record from the iPhone's/iPad's built-in mic at the same time as we record from the throat mic headset. Is there any way this is possible? Any other tips?