The SInt32 confuses me, as I would think that audio data samples are represented in an array. So how can SInt32 AudioUnitSampleType store the audio data? Or is this basically an array of many SInt32 values?
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The SInt32 confuses me, as I would think that audio data samples are represented in an array. So how can SInt32 AudioUnitSampleType store the audio data? Or is this basically an array of many SInt32 values?
The whole audio stream is stored as an array of samples, yes. But there are different ways to actually store those samples in memory – signed integer, unsigned integer, floating point and so on. And that is exactly what the
AudioUnitSampleTypeconstants tell you – which format a single sample is stored in. TheSInt32AudioUnitSampleTypeuses a signed (S) integer (Int) that is 32 bits wide (32) to store a single sample. It doesn’t tell you anything else about that audio stream though.