Charlie Carroll

I'm new to the FFT world. I've made an audio freeze plug in for Live using the pfft~ subpatch, which works fine. However, I want to be able to freeze up to 3 different points at once (so it creates layers) so I just duplicated the pfft~ three times but they all seem to select the same part at the same time instead of working separately. I've even saved three different versions of the three pfft~ sub patches and named them different things. So it seems like you can only have one in the patch. Does anyone know how I can solve this - as I say I'm still trying to get my head around fft'ing so it might be really simple for someone else!

I'm new to the FFT world. I've made an audio freeze plug in for Live using the pfft~ subpatch, which works fine. However, I want to be able to freeze up to 3 different points at once (so it creates layers) so I just duplicated the pfft~ three times but they all seem to select the same part at the same time instead of working separately. I've even  saved three different versions of the three pfft~ sub patches and named them different things. So it seems like you can only have one in the patch. Does anyone know how I can solve this - as I say I'm still trying to get my head around fft'ing so it might be really simple for someone else!

Hi there,
I'm new to the FFT world. I've made an audio freeze plug in for Live using the pfft~ subpatch, which works fine. However, I want t

can-you-have-multiple-pfft~-sub-patchers-in-the-same-patch

Sure, you can have many [pfft~] patchers in the same patch. It sounds like you are using the same buffer name (or matrix name) in several of your [pfft~] patchers. [buffer~] and [jit.matrix] names are global in Max.

Hi,
Sure, you can have many [pfft~] patchers in the same patch. It sounds like you are using the same buffer name (or matrix name) in several of your [pfft~] patchers. [buffer~] and [jit.matrix] names are global in Max.

Thank you so much for your reply that's done the trick! I actually based my patch off of a previous example of a freeze you posted - it's been extremely helpful to me in learning about FFT so thank you!

If you don't mind I have one more question which is in the example you kindly posted, is there a way of being able to change the grain size with a dial? I am yet to find where you even tell it what the buffer size is! I've changed all kinds of different numbers to have a go but its probably more obvious than I think.

Thank you so much for your reply that's done the trick! I actually based my patch off of a previous example of a freeze you posted - it's been extremely helpful to me in learning about FFT so thank you! 

I'm not sure which patch exactly you are talking about. If it's one averaging over a number of FFT analysis frames (maybe 8), then one way to change that is to change the duration of this small matrix for a smaller or larger number of frames (columns in the matrix). 

To allow for dynamic resizing of the freeze window, it's more involved: you need to track where you are writing, and to average the analysis on the "x previous frames". So, I would suggest you try the first "hard-wired" version first.

Charlie, 
Thanks for your interest.
I'm not sure which patch exactly you are talking about. If it's one averaging over a number of FFT analysis frames (maybe 8), then one way to change that is to change the duration of this small matrix for a smaller or larger number of frames (columns in the matrix). 
To allow for dynamic resizing of the freeze window, it's more involved: you need to track where you are writing, and to average the analysis on the "x previous frames". So, I would suggest you try the first "hard-wired" version first.
J-F

Can you have multiple pfft~ sub patchers in the same patch?