Reading audio with Extended Audio File Services (ExtAudioFileRead)

Question

I am working on understanding Core Audio, or rather: Extended Audio File Services

Here, I want to use ExtAudioFileRead() to read some audio data from a file

Answer 1

I think you're misunderstanding the purpose of the mNumberBuffers field. It's typically 1 for mono and interleaved stereo data. The only reason you would set it to something else is for multi-track data where each channel is in a separate data buffer.

If you want to read a part of a file, you would set dataByteSize of the buffer to a reasonable size, and when you read the file, tell the API only to give you that many bytes, and loop over it.