2: High quality. For example, the size of an AAC file with a sample rate of 32,000 Hz and a 10-minute recording is approximately 3.75 MB.
0: Low quality. For example, the size of an AAC file with a sample rate of 32,000 Hz and a 10-minute recording is approximately 1.2 MB.
1: (Default) Medium quality. For example, the size of an AAC file with a sample rate of 32,000 Hz and a 10-minute recording is approximately 2 MB.
3: Ultra high quality. For example, the size of an AAC file with a sample rate of 32,000 Hz and a 10-minute recording is approximately 7.5 MB.
Audio recording quality, which is set in startAudioRecordingWithConfig.