Issac,

kris is the same as in fof. As for kdec, I have to
work it out, but it's inversely proportional to the
bandwith (or proportional to Q). I just have to look
up the filter equations again to tell exact values.
I'll do it when I am back home.

all the best,

Victor

>
> [email.htm]
> 

> 
Dr. B-
> 
I just removed bassvox and replaced it with two other
> UDO's.  The first is vowgen, very much like bassvox
> except it has the formant structures built in for
> other  types of voice as well, such as soprano,
> etc.  The second is vowel, which is what you have
> been asking for.  It is vowgen, except now instead of
> the formants being mapped to fof generators they are
> mapped to bandpass filters.  This lets you do
> talk-box effects or vocal synthesis, but to my ear vowgen
> sounds a lot better for vocal synthesis.
 
I do not
> believe it is a particularly efficient UDO, since it has
> five butterbps in it.  Someone out there with more
> DSP knowledge than I should take a crack at it.  
> 
Victor-
 
My original plan was to use fofilter
> instead of butterbp, but I wasn't sure how kris and kdec
> mapped to the skirtwidth and bandwidth.  For example,
> If the formant requires a bandwidth of 60 at -6dB, how do
> I figure out what my kdec should be?
> 
Isaac
 

> 
 style="FONT-SIZE: 11px; FONT-FAMILY: tahoma,sans-serif">
> 

>
> 
From:  "Dr. Richard Boulanger" <
> ;rboulanger@berklee.edu>
Reply-To:
> ;csound@lists.bath.ac.uk
To:
> ;csound@lists.bath.ac.uk
Subject:
> ;Re: [Csnd] spectral freezing... - and
> more?
Date:  Sat, 29 Apr 2006 00:07:30
> -0400
>Isaac,
>
>your bassvox UDO is
> really great.  And yes, it is more of what I was
> 
>  looking for in terms of an
> opcode.  Still, what is missing
>from both
> yours and Victors is the ability to put an audio file into
> 
>  the filter and do "talk-box" effects
> where different settings
>sweep the formants through
> the vowels.  let's say that there were 5
> ; 
>*stops* on the filter, one for a, e, i, o,
> and u - and you
>could simply move, using a linseg,
> between these  six positions... 
>and
> ;there might also be ways of interpolating between vowels
> too.
>But, these vowal formants would be
> superimposed on any arbitrary  
>signal -
> like a vocoder.
>
>On Apr 28, 2006, at 6:47 PM
> , Isaac Wallis wrote:
>
>>Hi Dr. B,
>
> ;>
>>Perhaps my new UDO, bassvox, is more
> along the lines of what you're 
>>
> ;looking for?  It is a morfable-vowel vocal
> generator.  I used fof 
>>
> ;in it, not fofilter, because I think with fofilter I
> would need 
>>to  send different pulse
> trains for every formant in order to 
>>
> ;center  the frequencies.  Therefore,
> fof compacts my code a bit.
>>
>>Still,
> it's not a sweepable vowel filter.  That would
> be  way  
>>cooler, because you could
> put other signals through it(for example, 
>>
> ;  LPC residuals could be pretty interesting if
> processed by such a  
>>filter).
> ; It could be tricky to implement, though(for me,
> anyway).
>>
>>Anyway, I just added
> bassvox and an example csd into the UDO  
>
> ;>repository if it helps you out any.
>>
> ;
>>Isaac Wallis
>>
>>
>
> ;>
>>
>>>From: "Dr. Richard
> Boulanger" 
>>>
> ;Reply-To: csound@lists.bath.ac.uk
>>>To:
> csound@lists.bath.ac.uk
>>>Subject: Re: [Csnd]
> spectral freezing... - and more?
>>>Date: Fri,
> 28 Apr 2006 12:06:38 -0400
>>>
>>>
> ;maybe that will do.... I will check it out this
> weekend.
>>>
>>>Rick
>>
> ;>
>>>On Apr 28, 2006, at 12:00 PM, Victor
> Lazzarini wrote:
>>>
>>>>Have
> you tried fofilter? It is a formant filter,
>>>
> ;>a filter version of fof. Or did you have
> something
>>>>more complex in mind?
>
> ;>>>
>>>>Victor
>>>>
> ;
>>>>>
>>>>>Victor
> ,
>>>>>
>>>>>Hope you
> are well.
>>>>>
>>>>>
> ;While you are at it making us all a cool new
> *spectral
>>>>>freezing*
> opcode (and maybe other variants!)
>>>>>
> ;
>>>>>I would love to suggest that we
> have been missing a nice
>>>>>
> ;sweepable   format-filter opcode as well
>
> ;>>>>- one  that would let us use an f-table
> or linseg to sweep
>>>>>through the
> ;  vowels (formant-tables) to
>>>>>
> ;do vocal synthesis, talk-box, and other effects.
>
> ;>>>>
>>>>>They have a
> pretty nice one in the nord modular and in
>>>
> ;>>reaktor.
>>>>>
>>>
> ;>>Dr. B.
>>>>>
>>>>
> ;>On Apr 28, 2006, at 11:26 AM, Victor Lazzarini
> wrote:
>>>>>
>>>>>>
> ;There is no opcode as such at the moment, but it's
>
> ;>>>>>good that you asked because you
> reminded me to
>>>>>>do it, which
> should be simple.
>>>>>>
>>
> ;>>>>At the moment what you can do is to
> freeze an
>>>>>>analysed file, by
> keeping the value of ktim  in
>>>>>>
> ;pvsfread fixed.
>>>>>>
>>
> ;>>>>Victor
>>>>>>
>
> ;>>>>>>
>>>>>>>I
> wrote a class for Victor's SndObj library to do
> this
>>>>>and >> once I was
> ; done realised that looping a small
>>>
> ;>>snippet of >> the signal repeatedly
> ; resulting in pretty
>>>>>much the
> same >> sound as a 'spectral freeze', plus if
>
> ;>>>>was less CPU >> intensive. As for
> real spectral freezing
>>>>>in Csound, I
> >> ain't  too sure.
>>>>>
> ;>>
>>>>>>>Rory.
>>
> ;>>>>>
>>>>>>>
> ;Peiman Khosravi wrote:
>>>>>>>>
> ;Hello  everyone,
>>>>>>>>
> ;
>>>>>>>>I am back again with
> more questions!
>>>>>>>>
>
> ;>>>>>>>Is there a way to have a
> real-time spectral freezing
>>>>>>>
> ;>instrument using the pvs opcodes? I was thinking
> of
>>>>>>>>perhaps using the
> binit or pvsftw opcodes (?)
>>>>>>>
> ;>
>>>>>>>>Any advice will
> be much appreciated.
>>>>>>>>
> ;
>>>>>>>>Many thanks
>
> ;>>>>>>>
>>>>>>
> ;>>Peiman
>>>>>>>--
>
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