title: Issues with SourceDataLine format support
body: <p>I have an application written in Java in which I need to play audio. I used OpenAL (with java-openal library) for the task however I would like to use WSOLA which is not supported by OpenAL directly. I found a nice java-native library called TarsosDSP which has support for WSOLA.</p>
  
  <p>The library uses standard Java APIs for audio output. The issue occurs during the SourceDataLine setup:</p>
  
  <pre><code>IllegalArgumentException: No line matching interface SourceDataLine supporting format PCM_UNSIGNED 16000.0 Hz, 16 bit, mono, 2 bytes/frame, little-endian is supported.
  </code></pre>
  
  <p>I made sure the issue is not caused by the lack of permissions (ran it as root on Linux + tried it on Windows 10) and there are no other SourceDataLines used in the project.</p>
  
  <p>After tinkering with the format I found out that the format is accepted when it's changed from PCM_UNSIGNED to PCM_SIGNED. It seems like a minor issue since only moving the byte range form unsigned to signed should be pretty easy. However it's weird that it's not supported natively.</p>
  
  <p>So, is there some solution in which I wouldn't have to modify the source data?</p>
  
  <p>Thanks, Jan</p>