How to create discrete mono tracks with AVFoundationMBS

Add-Ons
1

Using these settings:

Var recordSetting as new Dictionary

Var n as integer = OSTypeFromStringMBS(AVFoundation.kAudioFormatAppleLossless)
recordSetting.Value(AVFoundationMBS.AVFormatIDKey) = n
recordSetting.Value(AVFoundationMBS.AVSampleRateKey) = 48000.0
recordSetting.Value(AVFoundationMBS.AVNumberOfChannelsKey) = 2
recordSetting.Value(AVFoundationMBS.AVLinearPCMBitDepthKey) = 24
recordSetting.Value(AVFoundationMBS.AVLinearPCMIsBigEndianKey) = false
recordSetting.Value(AVFoundationMBS.AVLinearPCMIsFloatKey) = false

gives me an audiofile with one stereo track.

How can I create an audiofile with two discrete mono tracks?

2

So convert one stereo track to two tracks with each mono audio?

3

Not convert, but record from stereo source and save an audiofile with two discrete mono tracks.

4

Sorry, I don’t know how to do this.

I would suggest looking into AVChannelLayoutKey to define a channel map.
This allows to map channels and helped us in a few cases already.

It could also be required to make two recording, so that each one records one of the channels.

5

Thank you, Christian.
I’ve already looked at it – but I don’t know how to use it.
Making two recordings is not an option