Hello, 

I am doing some experiments with pvswarp. If I modify the parameters
affecting the scaling ratio I can easily notice the change in the timbre of
the sound I'm processing. Not the same happens changing the values of the
spectral envelope shift: I can't notice any difference between one setting
and another one. In the Csound manual I read: "values > 0 shift the envelope
linearly upwards and values < 1 shift it downwards". Is it right? 



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yes, but there is a typo, it should read values < 0 shift it downwards.
Scaling is multiplication and shifting is offset (sum) (they parallel the pitch modifications in pvscale and pvshift, respectively).
So for instance

 ftps  pvswarp fsig, 1, 500

will shift the spectral envelope linearly by 500 Hz and you will definitely hear the difference (unless
you have a flat spectral envelope).
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 15 Mar 2016, at 18:27, Gpp  wrote:
> 
> Hello, 
> 
> I am doing some experiments with pvswarp. If I modify the parameters
> affecting the scaling ratio I can easily notice the change in the timbre of
> the sound I'm processing. Not the same happens changing the values of the
> spectral envelope shift: I can't notice any difference between one setting
> and another one. In the Csound manual I read: "values > 0 shift the envelope
> linearly upwards and values < 1 shift it downwards". Is it right? 
> 
> 
> 
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> View this message in context: http://csound.1045644.n5.nabble.com/pvswarp-tp5747901.html
> Sent from the Csound - General mailing list archive at Nabble.com.
> 
> Csound mailing list
> Csound@listserv.heanet.ie
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> Send bugs reports to
>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here

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I see, now it's working fine. Thank you



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