AudioUnit recording parameters
16k
Single channel
16 bits
setPreferredIOBufferDuration 0.05s
The default data collected is 2048 bytes.
When setting AVAudioSessionCategoryPlayAndRecord AVAudioSessionCategoryOptionDefaultToSpeaker
The collected data becomes 628 bytes and the sound is distorted.
How to solve this problem, I want to collect 2048 bytes when using AVAudioSessionCategoryOptionDefaultToSpeaker
