seems like the most efficient way would be to insert a pitch shifter after the granulation, and control the shift with automation (like reading through an array with values for each grain).

for the granulation a method I tried once was to have a bunch of delay loops of the same length. they each took an audio signal in, and a control in(at audio rate). if the control signal was 1, they recorded the incoming signal and stopped feeding back (to clear the delwrite~), if the control signal was 0, they had full feedback so looped forever.

to break up the audio between them have a square wave with the timbre compressed so that the '1' section is 1/16 the period (or at least the length of each delay line). now if you hook it up to each grain's control inlet and put it out of phase for each (0, 1/16, 2/16, 3/16....) then chunks of the signal will be written into each delwrite~ until it writes again. then all you need is a method to listen to each delay line.

it's not as flexible as creating each grain~ object because you have to setup the square wave, but I tried a smaller version (4) and it worked.
The patch is long gone but I'm pretty sure this is how it worked.

-brendan

david golightly wrote:

related question: which would be faster: writing an incoming signal to an array in real time (tabwrite~) or using a delay line (delwrite~) of the same length (ca. 4000 ms)? (i'm trying to implement a delay-line granulator that can pitch-shift in realtime using grains w/dur <= 200 ms, & trying to do it the least expensive way possible...)

thanks, david

...

From: zmoelnig@iem.at To: Phillip Stearns mindphone_divided@yahoo.com CC: pd-list@iem.at Subject: Re: [PD] Wave Shaping Date: Sat, 05 Feb 2005 14:00:03 +0100 (CET)

Zitiere Phillip Stearns mindphone_divided@yahoo.com:

...

Thanks for the tip! So is general rule to avoid realtime expr~

objects

...

if at all possible in the future?

i would have thought though some months ago, but matiu and tim taught me better.

[expr~] is a very useful and fast object (it is not slower than writing the maths in pd) (to know this would have saved me a _lot_ of patching in the past)

mfg.asd.r IOhannes

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I'm still scratching my head over a couple of glitches, though - it seems a few dozen samples of the original signal will on rare occaision bleed through unaltered... a 64-sample drop, perhaps? the vd~ is nested beneath the delwrite~, so I'm at a loss. Any ideas?

From: "david golightly" davigoli@hotmail.com To: bstine@telus.net CC: pd-list@iem.at Subject: [PD] dlgranulator~ patch Date: Wed, 09 Feb 2005 12:25:48 -0500

Hello List,

here's my first ever PD patch! any feedback would be most appreciated!

https://puredata.org/Members/davigoli/dlgranulator~

thanks,

David Golightly

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did you make sure to download all the files in the dlgranulator~ folder?
try opening the granulator.pd file, it has a couple of initial settings & is a good place to see what the patch can do.

From: Jamie Bullock jamie@postlude.co.uk To: david golightly davigoli@hotmail.com CC: PD List pd-list@iem.at Subject: Re: [PD] dlgranulator~ patch Date: Thu, 10 Feb 2005 10:43:50 +0000

This looks very promising, but I can't get it to work. Presumably it should just be a case of connecting an audio signal to grainengine's input, and connecting the output to the dac? Are there some required initial settings?

Jamie

On Wed, 2005-02-09 at 17:25, david golightly wrote:

...

Hello List,

here's my first ever PD patch! any feedback would be most appreciated!

https://puredata.org/Members/davigoli/dlgranulator~

thanks,

David Golightly

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Sorry for the multiple postings!

Let's try this again:

I've posted my new dlgranulator~ patch at:

https://www.puredata.org/Members/davigoli/dlgranulator%7E/download

you can also find it at:

https://www.puredata.org/Members/davigoli

it's now a ZIP file with all necessary files included, as well as a readme.

It will granulate real-time audio from [adc~] or any other audio source.

humbly, david

From: "david golightly" davigoli@hotmail.com To: davigoli@hotmail.com, jamie@postlude.co.uk CC: pd-list@iem.at Subject: Re: [PD] dlgranulator~ patch Date: Thu, 10 Feb 2005 14:55:45 -0500

sorry for not being clear:

the patch is named

dlgranulator~.pd

it uses (requires) the abstractions

bounded_rand.pd grainpiston~.pd

and is showcased in the file

granulator.pd

...

From: "david golightly" davigoli@hotmail.com To: jamie@postlude.co.uk CC: pd-list@iem.at Subject: Re: [PD] dlgranulator~ patch Date: Thu, 10 Feb 2005 11:11:47 -0500

did you make sure to download all the files in the dlgranulator~ folder?
try opening the granulator.pd file, it has a couple of initial settings & is a good place to see what the patch can do.

...

From: Jamie Bullock jamie@postlude.co.uk To: david golightly davigoli@hotmail.com CC: PD List pd-list@iem.at Subject: Re: [PD] dlgranulator~ patch Date: Thu, 10 Feb 2005 10:43:50 +0000

This looks very promising, but I can't get it to work. Presumably it should just be a case of connecting an audio signal to grainengine's input, and connecting the output to the dac? Are there some required initial settings?

Jamie

On Wed, 2005-02-09 at 17:25, david golightly wrote:

...

Hello List,

here's my first ever PD patch! any feedback would be most

appreciated!

...

https://puredata.org/Members/davigoli/dlgranulator~

thanks,

David Golightly

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Hallo, david golightly hat gesagt: // david golightly wrote:

I've posted my new dlgranulator~ patch at:

https://www.puredata.org/Members/davigoli/dlgranulator%7E/download

you can also find it at:

https://www.puredata.org/Members/davigoli

it's now a ZIP file with all necessary files included, as well as a readme.

It will granulate real-time audio from [adc~] or any other audio source.

Very cool patch!

I have some smalle remarks regarding the organisation: You use some global receives. This makes it impossible to use more than one instance of dlgran~ with *independent* settings. It would be nice, if the whole abstraction could be used multiple times.

Same with the windowing table, which will lead to "half-hanning multiply defined" warnings.

You could save some CPU cycles by removing hidden number boxes.

For storing presets I might recommend RRADical/Memento, which will give you OSC and through that midi control automatically. See http://footils.org/cms/show/1

I'll probably rradicalize your patch a bit, if you don't mind, for my own use.

Ciao

Frank Barknecht _ ______footils.org__

         _ __latest track: fqdn _ http://footils.org/cms/show/38

sorry for not being clear:

the patch is named

dlgranulator~.pd

it uses the abstractions

bounded_rand.pd grainpiston~.pd

and is showcased in the file granulator.pd

From: "david golightly" davigoli@hotmail.com To: jamie@postlude.co.uk CC: pd-list@iem.at Subject: Re: [PD] dlgranulator~ patch Date: Thu, 10 Feb 2005 11:11:47 -0500

did you make sure to download all the files in the dlgranulator~ folder?
try opening the granulator.pd file, it has a couple of initial settings & is a good place to see what the patch can do.

...

From: Jamie Bullock jamie@postlude.co.uk To: david golightly davigoli@hotmail.com CC: PD List pd-list@iem.at Subject: Re: [PD] dlgranulator~ patch Date: Thu, 10 Feb 2005 10:43:50 +0000

This looks very promising, but I can't get it to work. Presumably it should just be a case of connecting an audio signal to grainengine's input, and connecting the output to the dac? Are there some required initial settings?

Jamie

On Wed, 2005-02-09 at 17:25, david golightly wrote:

...

Hello List,

here's my first ever PD patch! any feedback would be most appreciated!

https://puredata.org/Members/davigoli/dlgranulator~

thanks,

David Golightly

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