Cycling 74 » Topic: speeding up a soundfile without altering pitch, in realtime

speeding up a soundfile without altering pitch, in realtime

mjhaanstra — Mon, 23 Jan 2006 13:54:22 +0000

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

Re: speeding up a soundfile without altering pitch, in realtime

roger.carruthers — Mon, 23 Jan 2006 14:12:01 +0000

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

Re: speeding up a soundfile without altering pitch, in realtime

titus bellwald — Mon, 23 Jan 2006 14:41:10 +0000

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

Re: speeding up a soundfile without altering pitch, in realtime

Jean-Francois Charles — Mon, 23 Jan 2006 15:29:22 +0000

Re: speeding up a soundfile without altering pitch, in realtime

Eric Lyon — Mon, 23 Jan 2006 18:35:16 +0000

The residency~ external from FFTease can easily do this.

Eric

Re: speeding up a soundfile without altering pitch, in realtime

volker böhm — Mon, 23 Jan 2006 19:01:12 +0000

or use standard msp-objects like gizmo~ and feed it with a speed-
controlled sfplay~.
doesn’t sound too bad.
cheers
volker.

Re: speeding up a soundfile without altering pitch, in realtime

John Nowak — Mon, 23 Jan 2006 23:08:54 +0000

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

Re: speeding up a soundfile without altering pitch, in realtime

Roman Thilenius — Thu, 26 Jan 2006 06:42:59 +0000