virtual d.j. beat-matcher: easily find percentage pitch shift for beat matching.

  match to previous track     match to BPM  
  phrase length (in measures) phrase start time (in samples) phrase end time (in samples) phrase length (in samples) BPM*:
new BPM: change Mix-to pitch by
change Mix-to duration by
  total song/sample length (samples): change Mix-to length to:

*Assuming 4/4 time and sample rate of 44.1kHz (CD-quality).