title: Periodically refill BufferedWaveProvider with NAudio (C#)
body: <p>I read audio data from a wave file and save this audio data (without the wave header information) in a byte[]. 
  Now I want to use NAudio in my C# project to stream from this byte[]. 
  I would like the buffer to be ~100ms long and to periodically refill it, so the playback never stops.</p>
  
  <p>I can create my BufferedWaveProvider object and fill it with the first x bytes from my byte[] but:
  How can I find out when the buffer is running low?</p>
  
  <p>Let's say I have the buffer filled for the first time. When I start playback via my WavePlayer object, the playback stops after the buffer was played back. But how do I refill this buffer with the next chunk of audio data before the playback cursor reaches the end of the buffer?</p>
  
  <p>Reason behind this is:
  I want to convert each buffer data via FFT so I can plot the current frequencies in my GUI.</p>
  
  <p>I hope somebody can help me out here.</p>