George Dennis

I was hoping if anyone could shed any light on a specific problem I'm having with a (sort-of) granular time-stretcher currently under construction.

The idea was to build something similar to Nathan Wolek's gran.groove.file~ but without externals or the pitch-shifting option his has. The patch below features one 'voice' and a sampling offset calculator.

Things go awry when I have more than one voice. Remembering to offset the phase on the lower phasor~s, I still get flanging 'artifacts' at higher playback speeds, and buzzes at lower ones. I'm sure it has something to do with the signal rate snapshot~/ edge~ combo, but can't figure out why that would be.

Any help at solving this would be much appreciated!

yet-another-time-stretch-thread

On 25 Mar 2008, at 20:39, George Dennis wrote:

> ... The patch below features one 'voice' and a sampling offset 

> Things go awry when I have more than one voice.

well, hard to tell what's wrong if you don't provide how you set up 

> Remembering to offset the phase on the lower phasor~s, I still get 

> flanging 'artifacts' at higher playback speeds, and buzzes at lower 

> ones. I'm sure it has something to do with the signal rate 

> snapshot~/ edge~ combo, but can't figure out why that would be.

in your case it's pretty easy to avoid going into max-event-land.

simply use a [sah~] object to sample the playback position everytime 

there are already tons of examples showing how to do it in the archives.

On 25 Mar 2008, at 20:39, George Dennis wrote:
> ... The patch below features one 'voice' and a sampling offset  
> calculator.
>
> Things go awry when I have more than one voice.

well, hard to tell what's wrong if you don't provide how you set up  
the other voices.

> Remembering to offset the phase on the lower phasor~s, I still get  
> flanging 'artifacts' at higher playback speeds, and buzzes at lower  
> ones. I'm sure it has something to do with the signal rate  
> snapshot~/ edge~ combo, but can't figure out why that would be.

in your case it's pretty easy to avoid going into max-event-land.
simply use a [sah~] object to sample the playback position everytime  
the grainphasor snaps back to zero.
there are already tons of examples showing how to do it in the archives.

Yet another time-stretch thread