static short[] decodeWAVToMonoSamples(File wavFile) ctex {
  temp WAVDecoder decoder = new(newFileInputStream(wavFile));
  ret decodeWAVToMonoSamples(decoder, wavFile);
}

// weird signature
static short[] decodeWAVToMonoSamples(WAVDecoder decoder, File wavFile) {
  ret decodeWAVToMonoSamples(decoder);
}

static short[] decodeWAVToMonoSamples(WAVDecoder decoder) ctex {
  new L<short[]> chunks;
  while licensed {
    short[] buf = new short[4096];
    int n = decoder.readMonoSamples(buf);
    if (n <= 0) break;
    chunks.add(subArray(buf, 0, n));
  }
  ret concatShortArrays(chunks);
}