import javax.sound.sampled.*;

svoid spectro_intRangesToWAV(Clip clip, L<IntRange> parts, File wavFile) ctex {
  if (empty(parts)) ret with deleteFile(wavFile);
  
  new L<InputStream> l;
  int frames = 0;
  for (IntRange r : parts) {
    if (nempty(l)) {
      int n = 44100/2; // half a second
      l.add(ZerosInputStream(n*2));
      frames += n;
    }
    int n = r.length()*clip.getFrameTimeSamples();
    l.add(clip.getAudio(r.start*clip.getFrameTimeSamples(), n));
    frames += n;
  }
  AudioFormat format = ((AudioInputStream) first(l)).getFormat();
  //temp AudioInputStream stream = AudioSystem.getAudioInputStream(format, sequenceInputStream(l));
  temp AudioInputStream stream = new(sequenceInputStream(l), format, frames);
  AudioSystem.write(stream, AudioFileFormat.Type.WAVE, mkdirsForFile(wavFile));
}