| Hi all
I´ve attached the orc code for the Moog resonant Lowpass implementation
as described in Stilson&Smith. It sound great and the filter looks
robust.
Enjoy it!
;ORCHESTRA
sr = 44100
kr = 44100
ksmps = 1
instr 1
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; bandlimited sawtooth generator
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
ibound = sr/2
kfreq = 100
apulse1 buzz 1, kfreq, ibound/kfreq, 1
asawdc filter2 apulse1, 1, 1, 1, -.99; leaky integrator
asaw = asawdc - .5
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Resonant filter (4-pole LPF)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;You can replace this filter with any other you like
ax = asaw
;cutoff and resonance envelopes
;quick test curves
kres init p4
kfco expseg p6, p3/2, p5, p3/2, p6
ay1 init 0
ay2 init 0
ay3 init 0
ay4 init 0
kfcon = kfco/(sr/2); use freq normalized DC to Nyquist
kp tablei kfcon, 21, 1; (approximated) tuning table
kscale tablei (kp+1)/2, 20, 1; adjust feedback (approximation)
kk = kres*kscale
; inverted feedback for corner peaking
ax = ax - kk*ay4
; 4 cascaded onepole filters (bilinear transform)
ax1 delay1 ax
ay1 = ax * (kp+1)/2 + ax1 * (kp+1)/2 - kp*ay1
ay11 delay1 ay1
ay2 = ay1 * (kp+1)/2 + ay11 * (kp+1)/2 - kp*ay2
ay21 delay1 ay2
ay3 = ay2 * (kp+1)/2 + ay21 * (kp+1)/2 - kp*ay3
ay31 delay1 ay3
ay4 = ay3 * (kp+1)/2 + ay31 * (kp+1)/2 - kp*ay4
; clipper/distorter via waveshaping
; to allow autooscillation without overdriving
; certainly more efficient with table look-up,
; but it didn´t work. Any idea?
ay4 = ay4-ay4*ay4*ay4/6; kind of bandlimited sigmoid
;filter output
; envelope
kenv linen 1, .1,p3, .1
out ay4*20000*kenv
endin
;SCORE
; a sine wave
f1 0 8193 10 1
; feedback adjusting curve
f20 0 8193 -25 0 4 8192 1
; tuning curve
f21 0 8193 -27 0 -1 2048 -.22 4096 .4 6144 .83 7168 .92 8192 1
; resonance max fco initial & final fco
i1 0 1 .1 1000 200
i1 1 5 .8 5000 500
i1 6 5 .5 10000 50
i1 11 5 .99 8000 20
e
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Date: Sat, 05 Sep 1998 14:32:50 -0400
From: Antoine Lefebvre
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To: Nicola Bernardini
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Subject: Re: Bug in OSS code?
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Nicola Bernardini wrote:
> On Thu, 3 Sep 1998, Larry Troxler wrote:
>
> [snip - we're talking about 6 seconds latency on real-time MIDI playing]
> > Sorry the above is so muddled. Hopefully Dave Phillips or someone else
> > working on the Linux version could point you to the exact source code to
> > check.
> >
> > OTOH, If you just recently downloaded the current Linux version, then
> > this should be already fixed, so maybe your problem is something else.
>
> I have no solution to this problem right now, but I am compiling a list
> of TODO things for linux which includes reported bugs (to be fixed) and
> I have included you mail in it (in the hope a kind sould finds a solution
> to the problem).
The problem of the 6 seconds delay in real time MIDI playing was not abug of the OSS
code. I finally find that it was a mistake in my use of csound
orchestra and command line.
Please, don't put this problem in the TODO list.
Antoine
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Date: Sat, 05 Sep 1998 20:27:10 +0100
From: Gareth Whittock
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Subject: examples of orcs and scores
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Is there a repository of orcs and scores for a learner like myself to
unpick in order to understand csound? I tried the Amsterdam site but
can't seem to access it.
Gareth Whittock
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Date: Sat, 05 Sep 1998 13:24:49 -0800
From: Mark Polishook
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Subject: Re: examples of orcs and scores
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> Is there a repository of orcs and scores for a learner like myself to
> unpick in order to understand csound?
A excellent Csound tutorial exists at:
http://www.sfu.ca/sca/Manuals/Csound/CsoundIndex.html#Hamel
**************************************
Mark Polishook
Assistant Professor of Composition
Music Department
Central Washington University
Ellensburg, WA 98926
e-mail: polishoo@cwu.edu
www: http://www.cwu.edu/~music/composition
tel.: 509-963-1245
fax: 509-963-1239
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From: pete moss
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yeah, i get them and then delete them. i didnt realize that others on the
list were getting them. i guessed this guy picked up my address from a
web site, or browser cookie or something. do we have a rogue on the list
selling addresses to the enemy?
pete
Larry Troxler wrote:
> Just wondering if anyone else has been receiving these UCE's from the
> doctoraudio.com domain, and what if anything, have you been able to do
> about it?
> Has anyone got anywhere in tracking it down, legal action, etc?
>
> Larry
>
>
> -- Larry Troxler -- lt@westnet.com -- Patterson, NY USA --
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To: polishoo@cwu.edu
Cc: Gareth Whittock , csound@maths.ex.ac.uk
Subject: Re: examples of orcs and scores
Date: Sun, 06 Sep 1998 09:15:47 GMT
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From: Jens Reimer
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On Sat, 05 Sep 1998 13:24:49 -0800, you wrote:
>> Is there a repository of orcs and scores for a learner like myself to
>> unpick in order to understand csound?
>
>A excellent Csound tutorial exists at:
>
>http://www.sfu.ca/sca/Manuals/Csound/CsoundIndex.html#Hamel
>
true, but only online.
do you know any offline tutorial (zipped or doc or anything like this..)
Und Tschüss
Jens Reimer
Email:
jens.reimer@t-online.de
|