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!7

static int bufSize = 40960;
static short[] loop1, loop2;
static volatile short[] nextLoop2;

p {
  loop1 = decodeWAVToStereoSamples(loadLibrary(#1400093));
  loop2 = decodeWAVToStereoSamples(newFile(downloadsDir(), "27130__pryght-one__harp.wav"));
  VF1<short[]> vf = mixLoops();
  playAudioFromSampleMakingFunction(bufSize, vf);
  bot();
}

sS answer(S s) {
  File f = putInDirIfNotAbsolute(downloadsDir(), s);
  nextLoop2 = decodeWAVToStereoSamples(f);
  ret "OK";
}

static VF1<short[]> mixLoops() {
  ret new VF1<short[]>() {
    int i = 0;
    
    void get(short[] pair) {
      int j = max(0, min(l(loop2)-1, 2*iround(i/2*((double) l(loop2))/l(loop1))));
      pair[0] = (short) ((loop1[i] + loop2[j])/2);
      pair[1] = (short) ((loop1[i+1] + loop2[j+1])/2);
      i = (i+2) % l(loop1);
      if (i == 0 && nextLoop2 != null) {
        loop2 = nextLoop2;
        nextLoop2 = null;
      }
    }
  };
}