An error is returned when kAudioFormatAMR_WB is set in AVFormatIDKey of AVAudioFile.

App & System Services Core OS
kotaro99 OP
Created Mar ’21
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I'm not sure about the AVFormatIDKey that can be used with AVAudioFile, so please support me.

I tried to create a file for output using the AVAudioFile (forWriting: settings :) API.
I set the following in settings
AVFormatIDKey: Int (kAudioFormatAMR_WB),
AVSampleRateKey: 16000,
AVNumberOfChannelsKey: 1,
AVEncoderBitRatePerChannelKey: 16
As a result, API returns Error code 1718449215 (unsupported format).
So I would like to ask you, if you set this kAudioFormatAMR_WB constant,
Could you please tell me if it doesn't work or if it works but the operation is not guaranteed?
Also, are there any steps to make it work?
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An error is returned when kAudioFormatAMR_WB is set in AVFormatIDKey of AVAudioFile.
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