One thing you might try is do substantial pitch shifting or
frequency shifting,
which will move the amplitudes, then recombining the
freqs of the original signal with the shifted amplitudes
using pvsvoc.

But I guess it's also possible to do it using tables.

Victor

----- Original Message ----- 
From: "peiman khosravi" 
To: 
Sent: Monday, March 02, 2009 2:15 PM
Subject: [Csnd] pvs and spectral warping (as in GRM tools)


> Hello all,
>
> What is the best way to rearrange amplitude data in an FFT frame using
> pvs signal?
>
> I basically want to swap the amplitude data of one bin with another
> before synthesizing the FFT frame. So for instance to say that I want
> the amplitude of bin one to be swapped with the amplitude of bin 10
> and so on, but for every bin. I have tried pvsftw and vcopy but the
> result is very wobbly and not what I expected at all.
>
> The aim is to imitate the GRM tools spectral Warp. Is this possible?
>
> Many thanks in advance
>
> Best
> Peiman
>
>
> Send bugs reports to this list.
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe 
> csound" 

Thanks for reply,

That's a very interesting idea will try it tomorrow. I finaly managed
to implement it as a udo using tables. I'll post the code here soon.

Thanks
Peiman



2009/3/2 victor :
> One thing you might try is do substantial pitch shifting or
> frequency shifting,
> which will move the amplitudes, then recombining the
> freqs of the original signal with the shifted amplitudes
> using pvsvoc.
>
> But I guess it's also possible to do it using tables.
>
> Victor
>
> ----- Original Message ----- From: "peiman khosravi"
> 
> To: 
> Sent: Monday, March 02, 2009 2:15 PM
> Subject: [Csnd] pvs and spectral warping (as in GRM tools)
>
>
>> Hello all,
>>
>> What is the best way to rearrange amplitude data in an FFT frame using
>> pvs signal?
>>
>> I basically want to swap the amplitude data of one bin with another
>> before synthesizing the FFT frame. So for instance to say that I want
>> the amplitude of bin one to be swapped with the amplitude of bin 10
>> and so on, but for every bin. I have tried pvsftw and vcopy but the
>> result is very wobbly and not what I expected at all.
>>
>> The aim is to imitate the GRM tools spectral Warp. Is this possible?
>>
>> Many thanks in advance
>>
>> Best
>> Peiman
>>
>>
>> Send bugs reports to this list.
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>> csound"
>
>
>
> Send bugs reports to this list.
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
> csound"
>