Time Stretch/ Pitch Mod Using FFT

Mar 26, 2013 at 3:15pm

Time Stretch/ Pitch Mod Using FFT


For a uni project I am building a time/pitch manipulation patch using the pfft~ object

I have been using the tutorial patch on phase vocoder to get me started with various articles online to help me tweak this however i feel i am not really doing anything different from the tutorial patch. I was wondering if many other users have experimented with this type of DSP and have any patches i could browse/take apart to help with mine or just some ideas of things to experiment with. I grasp the concept and how this is executed in the example patch but at my level i cannot see how to improve on it. i have added different pfft~ objects with different windowing types but i have become some what stuck on how to further this.

Ways to create smoother/rougher synthesis?

I promise not to steal your patch – i have integrity. also my tutor is a user of max so he WILL find out – he will probably read/reply to this thread.

I just need some inspiration or advice.

Any help will be gratefully appriciated.

Please ask any questions if i have missed anything your interested in or what not

Thanks Again


Mar 29, 2013 at 5:01pm

i guess nobody has anything on this?

Mar 29, 2013 at 8:38pm

For what it’s worth, I’ve found Christoph Charles’ jitter-based phase vocoders to have a lot more room in them for tweaking, but that may not be in the official purview of your project…


Mar 30, 2013 at 12:54am

for your needs this is the best url in the universe:


if you’ve got a spectral processing idea for max– it’s most likely already been done by JFC

Apr 4, 2013 at 12:24am

thank you for your replies – will research them now.


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