Darek Rossman

Is there some kind of relationship between the pitch and time of a loop? What Im trying to do is set a playback speed for a loop. Say 1.5 times faster (increasing the pitch of the loop) and then having a gizmo~ object shift the pitch back down so that the loop will be as close to its original pitch as possible. Is there a relationship between the playback speed and the numbers i send to gizmo~ ? Is there some function or operation to find out this ratio if it exists?

Thanks for any help- or any other tips on how I might go about correcting the pitch of a loop as its playback speed changes.

Is there some kind of relationship between the pitch and time of a loop? What Im trying to do is set a playback speed for a loop. Say 1.5 times faster (increasing the pitch of the loop) and then having a gizmo~ object shift the pitch back down so that the loop will be as close to its original pitch as possible. Is there a relationship between the playback speed and the numbers i send to gizmo~ ? Is there some function or operation to find out this ratio if it exists? 

Thanks for any help- or any other tips on how I might go about correcting the pitch of a loop as its playback speed changes.


ptich-to-time-ratio

Hi, look for the transratio abstraction. I'm pretty sure it is hidden 

somewhere inside the examples folder. It translates transposition in 

terms of MIDI notes up/down to playback rate.

Hi, look for the transratio abstraction. I'm pretty sure it is hidden  
somewhere inside the examples folder. It translates transposition in  
terms of MIDI notes up/down to playback rate.

if i understand your question, you're trying to alter playback speed of the

loop without altering the pitch. gizmo will do this for you.

if your playback speed is X, then you should multiply the pitch by 1/X .

the relationship between playback speed and pitch is 1:1, meaning if you

double the playback speed you double the pitch, if you halve the playback

speed you halve the pitch. So if you want to keep the pitch constant while

you double the speed of playback, then you should halve (1/double) the pitch

if i understand your question, you're trying to alter playback speed of the
loop without altering the pitch.  gizmo will do this for you.

the relationship between playback speed and pitch is 1:1, meaning if you
double the playback speed you double the pitch, if you halve the playback
speed you halve the pitch.  So if you want to keep the pitch constant while
you double the speed of playback, then you should halve (1/double) the pitch
of the loop after you speed it up.

On Apr 26, 2006, at 8:52 AM, Darek Rossman wrote:

> Is there some kind of relationship between the pitch and time of a 

The long answer is that it is complex and depends on the amount of 

noise versus harmonic content. Try running white noise through your 

looper some time and you'll see what I mean.

The short answer is that the pitch shifting ratio is *usually* close 

to the inverse of the playback speed. For example, 0.5x speed and 2x 

pitch shift, 2x speed and 0.5x pitch shift.

> Thanks for any help- or any other tips on how I might go about 

> correcting the pitch of a loop as its playback speed changes.

You might try a granular solution, such as [gran.groove.file~] from 

On Apr 26, 2006, at 8:52 AM, Darek Rossman wrote:
> Is there some kind of relationship between the pitch and time of a  
> loop?

The long answer is that it is complex and depends on the amount of  
noise versus harmonic content.  Try running white noise through your  
looper some time and you'll see what I mean.

The short answer is that the pitch shifting ratio is *usually* close  
to the inverse of the playback speed.  For example, 0.5x speed and 2x  
pitch shift, 2x speed and 0.5x pitch shift.

> Thanks for any help- or any other tips on how I might go about  
> correcting the pitch of a loop as its playback speed changes.

You might try a granular solution, such as [gran.groove.file~] from  
my GTK.  Visit the URL in the signature.

-----
Nathan Wolek
nw@nathanwolek.com
http://www.nathanwolek.com


by the way, thanks a huge amount for the gran toolkit...its exactly what i needed

Ptich to Time Ratio?