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iosaudiosampling

How to calculate number of samples from length of audio file?

Given an audio file of duration say 10s, how do I find out the no of samples betweeen 2s and 8s?

Solution

  • if it's LPCM (e.g. not compressed), then use the sample rate.

    in pseudocode:

    double sampleRate = audioFile.getSampleRate();
// you may also need to account for channel count here
size_t sampleCount = sampleRate * (8-2);

    -- where (8-2) represents "betweeen 2s and 8s"