Hi,

my plan is to write a grain looper with different readouts for manipulating one
incoming audio signal.
the (biggest) problem is that the pitch changes when i have different array sizes.
the reason for that is clear but i have no idea how to work it out.
IM BAD IN MATH! (...and english : )

well... i attach my patch....hopefully someone will help me out...

thx in advance!!!

flo.

http://www.pdpatchrepo.info/hurleur/grainguitar.pd

First off, it would help if you included comments explaining what's going on and where you think the problem is, especially with a somewhat complicated patch like this. I'm not really seeing the array size being changed anywhere.

You might be referring to the [phasor~] on the left side of the [pd process] patch. This seems to be altering the grain size by playing it at different speeds. But it is also being used to look up the table, which causes it also to be played at different speeds, resulting in pitch change. If you want the pitch to stay constant when you change the grain size, you should use the [phasor~] on the right to look it up, as it seems to be the one controlling the overall playback speed. I tried this, and it seems to have the result of sounding pretty much like the dry audio. So now I'm wondering, what is the effect you are going for?

Also, you might want to be able to figure out the playback speed of the original file. You could do it like this:

[r loop1]
| [samplerate~]
| /
[pack f f]
|
[/ ] [1 \ <--use this numberbox to adjust the speed
| /

• |
  [$1 5(
  |
  [line~] <--to smooth it out
  |
  [phasor~]

You also have two delay lines with the same name. You should fix that.

hi,

first...thanksalot for helping!!!
i try to figure it out and post it again.

flo.

hi,

i didnt came too far...but!
heres the result....

im still open for any suggestion to make it better!

i have two arrays which read a audiofile "git.wav"

process1/process2 does the "grain" stuff. (which is a horrible mess:)

write/read contains the writing and loading process.
you can record an audiofile by trigger: ctlin 39 (default)
the table reads it when it gets the trigger: ctlin 45 (default)
which also should phase sync the two arrays (hopefully)

master section contains the (bad:) audio routing and fx.

i added some fx: verb and filter delay....

for better handling theres a overview section which opens directly.
you can change values here....

the sample should run in original tempo when its loaded into the array...

hopefully somebody can use it : )

flo.

http://www.pdpatchrepo.info/hurleur/grainguitar.pd

sorry!!!
i forgot....
i used the grainloop idea from johannes kreidler.

http://www.pd-tutorial.com/german/index.html

flo.