title: Unity 3D Audio crackling
body: <p>I'm loading (local or from web) 6 stereo audio files that play in sync.
  They do play synchronized, thanks to the PlayScheduled capability.</p>
  <pre><code>Ch1_Master.PlayScheduled(AudioSettings.dspTime + 1);
  </code></pre>
  <p>What I can't solve and that's why I came here is the crackling in the audio.
  I tried to change with DSP buffersize, but without success. I even created several buttons to change between 64, 128, 256, 512, 1024, 2048, but although some of them could improve, did not solve at all.</p>
  <pre><code>public void SetBufferSize(int bufferSize)
  {
      AudioConfiguration config = AudioSettings.GetConfiguration();
      config.dspBufferSize = bufferSize;
      AudioSettings.Reset(config);
  }
  </code></pre>
  <p>I tried both Mac and Android builds. The problem also occurs inside Unity runtime.</p>
  <p>I put each audio directed to a specific mixer group. 6 groups + 1 master group.</p>
  <p>Is there something else I can try?</p>