static CloseableItIt<short[]> decodeWAVToMonoSamples_iterator(File wavFile) ctex {
  WAVDecoder decoder = new(newFileInputStream(wavFile));
  ret combineAutoCloseables(decodeWAVToMonoSamples_iterator(decoder), decoder);
}

static CloseableItIt<short[]> decodeWAVToMonoSamples_iterator(WAVDecoder decoder) {
  ret iteratorFromFunction_f0_autoCloseable(func -> short[] {
    short[] buf = new short[4096];
    int n = decoder.readMonoSamples(buf);
    if (n <= 0) null;
    ret subArray(buf, 0, n);
  });
}