Dear Csounders,

could anybody comment why rezzy behaves like this. I modulate its frequency
by expseg from 10000 to 1 and back to 10000 Hz. On Linux in 5.13 when it
reaches 10000 Hz again it stucks. I hear click and sound drops. Console
shows an astronomic amplitude. On MacOS in 6.02 the same happens already
when it reaches the lowest frequency point. The sound just stucks. No
response. Inf amplitude. Please try it. 

instr 1
a1	rand 0.9
k1 expseg 10000, 5, 1, 5, 10000
ires = 8
a2	rezzy a1, k1, ires
a3	rezzy a2, k1, ires
aout = a3
	outs aout,aout
endin
test_filter.csd
  




-----
Gleb Rogozinsky, PhD
Associated Professor
Interactive Arts Department
Saint-Petersburg University of Film and Television

Deputy Director of Medialab
Saint-Petersburg University of Telecommunications
--
View this message in context: http://csound.1045644.n5.nabble.com/Problem-with-rezzy-tp5731699.html
Sent from the Csound - General mailing list archive at Nabble.com.

I am afraid that filter is liable to blow up. It's not very stable. It does not seem to like resonance values that are too low,
and also low frequencies.

Victor
On 15 Jan 2014, at 19:38, Gleb wrote:

> Dear Csounders,
> 
> could anybody comment why rezzy behaves like this. I modulate its frequency
> by expseg from 10000 to 1 and back to 10000 Hz. On Linux in 5.13 when it
> reaches 10000 Hz again it stucks. I hear click and sound drops. Console
> shows an astronomic amplitude. On MacOS in 6.02 the same happens already
> when it reaches the lowest frequency point. The sound just stucks. No
> response. Inf amplitude. Please try it. 
> 
> instr 1
> a1	rand 0.9
> k1 expseg 10000, 5, 1, 5, 10000
> ires = 8
> a2	rezzy a1, k1, ires
> a3	rezzy a2, k1, ires
> aout = a3
> 	outs aout,aout
> endin
> test_filter.csd
>   
> 
> 
> 
> 
> -----
> Gleb Rogozinsky, PhD
> Associated Professor
> Interactive Arts Department
> Saint-Petersburg University of Film and Television
> 
> Deputy Director of Medialab
> Saint-Petersburg University of Telecommunications
> --
> View this message in context: http://csound.1045644.n5.nabble.com/Problem-with-rezzy-tp5731699.html
> Sent from the Csound - General mailing list archive at Nabble.com.
> 
> 
> Send bugs reports to the Sourceforge bug trackers
> csound6:
>            https://sourceforge.net/p/csound/tickets/
> csound5:
>            https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
> 
> 

Dr Victor Lazzarini
Senior Lecturer
Dept. of Music
NUI Maynooth Ireland
tel.: +353 1 708 3545
Victor dot Lazzarini AT nuim dot ie

Ok,

thank you, Victor! 
I'll try another one. I would like to emulate a good resonant LP filter. I
want to use it live so it should be solid stable. 



-----
Gleb Rogozinsky, PhD
Associated Professor
Interactive Arts Department
Saint-Petersburg University of Film and Television

Deputy Director of Medialab
Saint-Petersburg University of Telecommunications
--
View this message in context: http://csound.1045644.n5.nabble.com/Problem-with-rezzy-tp5731699p5731701.html
Sent from the Csound - General mailing list archive at Nabble.com.

Then moogvcf or moogladder are your friends.
On 15 Jan 2014, at 21:01, Gleb wrote:

> Ok,
> 
> thank you, Victor! 
> I'll try another one. I would like to emulate a good resonant LP filter. I
> want to use it live so it should be solid stable. 
> 
> 
> 
> -----
> Gleb Rogozinsky, PhD
> Associated Professor
> Interactive Arts Department
> Saint-Petersburg University of Film and Television
> 
> Deputy Director of Medialab
> Saint-Petersburg University of Telecommunications
> --
> View this message in context: http://csound.1045644.n5.nabble.com/Problem-with-rezzy-tp5731699p5731701.html
> Sent from the Csound - General mailing list archive at Nabble.com.
> 
> 
> Send bugs reports to the Sourceforge bug trackers
> csound6:
>            https://sourceforge.net/p/csound/tickets/
> csound5:
>            https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
> 
> 

Dr Victor Lazzarini
Senior Lecturer
Dept. of Music
NUI Maynooth Ireland
tel.: +353 1 708 3545
Victor dot Lazzarini AT nuim dot ie

The thing I don't really like in moogvcf that it behaves like in picture
attached. I mean you can see several peaks instead of usual one. But
moogladder is nice. Very well
moogvcf.JPG   





-----
Gleb Rogozinsky, PhD
Associated Professor
Interactive Arts Department
Saint-Petersburg University of Film and Television

Deputy Director of Medialab
Saint-Petersburg University of Telecommunications
--
View this message in context: http://csound.1045644.n5.nabble.com/Problem-with-rezzy-tp5731699p5731703.html
Sent from the Csound - General mailing list archive at Nabble.com.