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Spectrum Mod Questions

Date1997-06-15 19:26
FromReid Sweatman
SubjectSpectrum Mod Questions
I'm trying to create sounds with timbres drawn from one source and 
vocal formants from another.  I've tried various combinations of the 
obvious instructions, with best results from pvcross and 
lpread/lpreson, with a bit of help from follow.  What I'm after, 
specifically, is the "talking synth" sound you used to hear in 
cartoons and so on, which I suspect was done with a Moog vocoder.  
Now, it's pretty apparent that my instruments are behaving as 
intended, but the results aren't quite what I expected, and I was 
hoping someone could tell me why, and how to correct it.

What I'm getting is far too much of the vocal timbres in the final 
product, even with pvcross, which is supposed to use only formant 
information from the first file.  For instance, in a vocal source 
that ends on a heavy sibiliant, the sibilant is still obviously 
present in the output, even though the timbre file sounds anything 
but sibilant.  The effect is as though I had merely mixed the two 
files, rather than imposed formant information from one onto the 
other.  What gives?  (BTW, I use the follower to force the first 
file's envelope onto the output, even though I may be using a fair 
amount of formant information from the timbre file; the presence or 
absence of this follower element makes no difference in the 
phenomenon I'm reporting).

Is it merely that I have unrealistic expectations for these 
functions?  I know I've heard the kind of sounds I expect.  Years ago 
in Ussachevsky's computer music class Tracy Peterson played us a 
composition he'd done that did something like this, using a vocal 
aria for formant information and a Bach fugue for timbre information, 
and it was exactly the thing I have in mind.

Additional question:  can anyone give any general guidelines for good 
flag settings for pvanal and lpanal?  Thanks.

Reid Sweatman
shadow@u.cc.utah.edu



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Date: Mon, 16 Jun 1997 12:24:28 -0200 (GRNLNDDT)
From: Christian Lyra 
To: csound@maths.ex.ac.uk
Subject: new keyboardmag reader who read about csound
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Hi all

	I was just listening for sometime.  I'm new to csound although i
dowloaded it 3 months ago (ah, the university schedule...).  I have a
modest system: a 486 dx4-100 with 24mb and a soundblaster clone card.
	I'd like to know more about new types of synthesis and know more
about additive synthesis.  Anyone can help?
	I'd like to meet another brazilian csound users. Do you know
another one?

	Bye
		Christian Lyra 

Ps. sorry, my english is horrible...




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Date: Mon, 16 Jun 1997 14:01:27 -0500 (CDT)
From: dek 
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> 	I'd like to know more about new types of synthesis and know more
> about additive synthesis.  Anyone can help?

Curtis Roads wrote (1996) _The Computer Music Tutorial_.  It's a great
introduction to the various styles and is wonderfully documented.  While
it only really provides overvies, the documentation can lead you to more
detailed accounts.

eric filson




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To: csound@maths.ex.ac.uk
From: Kim Cascone 
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Date: Mon, 16 Jun 1997 15:15:48 -0700
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>Date: Sun, 15 Jun 1997 22:19:06 -0400
>From: Jean Piche 
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>To: csound 
>Subject: List mail errors

>Hmmm... every time I post to the list, I get a Mail Delivery failure
>message... but the message seems to get posted anyways...
>
>Anybody else get this?



I have been getitng this for around 3 weeks now...not sure if my mail is
getting posted though as I don't always recieve a copy each time I post
something...
KIM

______________________________________
  kim(_)cascone  


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On 16 Jun 97 at 14:01, dek wrote:

> 
> > 	I'd like to know more about new types of synthesis and know more
> > about additive synthesis.  Anyone can help?
> 
> Curtis Roads wrote (1996) _The Computer Music Tutorial_.  It's a
> great introduction to the various styles and is wonderfully
> documented.  While it only really provides overvies, the
> documentation can lead you to more detailed accounts.

It can be bought from Electronic Music Foundation or Amazon.com :
http://www.emf.org
http://www.amazon.com/exec/obidos/ISBN=0262680823/t/9164-5394484-473816

Another interesting books on the same subject :

-Charles Dodge and Thomas A. Jerse  :  Computer Music, Synthesis, Composition and Performance. 
http://www.amazon.com/exec/obidos/ISBN=0028646827/t/9164-5394484-473816

-Richard F. Moore  :  Elements of Computer Music
http://www.amazon.com/exec/obidos/Author=Moore%2C%20F.%20Richard/9164-5394484-473816

More books on computer music can be found in the following :
http://www.ccc.nottingham.ac.uk/~amxvl/junho97.htm


Antonio Augusto Caminhoto Neto
Rua Prof. Joao Candido,434, 10o andar
86010-000 Londrina PR BRASIL
guto@sercomtel.com.br