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: http://johnnowak.com/temp/resynth.zip
      Uses about ~2% CPU on my Powerbook. The idea was to keep it efficient so I could use 20-30 in parallel.
      - John