sox stretch timing inaccuracy

• sox stretch timing inaccuracy

• • % time play angels.wav
  • real 3m53.084s
  • % time play angels.wav stretch 2
  • real 7m46.794s
  • 3:53.084 is 233.084 seconds
  • 2 x 233.084 is 466.168 seconds (expected)
  • 7:46.794 is 466.794 (actual)
  • 0.626 second error by end of song
  • 0.75 beat error at 120 BPM