speeding up a soundfile without altering pitch, in realtime


    Jan 23 2006 | 1:54 pm
    dear max list members,
    i know i can easily speed up a sound file's playback by altering the
    playback speed in sfplay objects etc. and other software does things
    like time stretch/compress with pitch correction. my question: is
    there something out there for maxmsp that would enable us to make a
    soundfile play progressively faster but doesn't raise the pitch?
    again, the first part can be done with a ramp to the speed input on a
    groove object, but what about pitch correction?
    alternatively, is there other software out there that can do a dynamic
    real time speed increase/decrease with pitch kept stable?
    thanks in advance, and best regards
    martin

    • Jan 23 2006 | 2:12 pm
      Have a look in the Examples/Sampling/granular folder.
      Always worth checking the archives first - this one
      has come up a few times over the years,
      cheers
      Roger
    • Jan 23 2006 | 2:41 pm
      For external software you might wanna try SoundHack (free). You can
      draw Graphs for speed or pitch change and then save output to a new
      soundfile if you want to.
      Or if you really need the real time thing try ableton live - though not
      free...
      Titus Bellwald
    • Jan 23 2006 | 3:29 pm
    • Jan 23 2006 | 6:35 pm
      The residency~ external from FFTease can easily do this.
      Eric
    • Jan 23 2006 | 7:01 pm
      or use standard msp-objects like gizmo~ and feed it with a speed-
      controlled sfplay~.
      doesn't sound too bad.
      cheers
      volker.
    • Jan 23 2006 | 11:08 pm
      Here is an example of how to do this with standard MSP objects:
      Uses about ~2% CPU on my Powerbook. The idea was to keep it efficient
      so I could use 20-30 in parallel.
      - John