| Hi,
I've had an odd problem with the following simple orc and sco which I have
written to test something else I am working on:
;Orc
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1
instr 1 ; Sine sweep generator
ilevl = ampdb(96 + p4)
ifreq1 = p5
ifreq2 = p6
asweep expseg ifreq1, p3, ifreq2
aosc oscil3 1, asweep, 1
out aosc*ilevl
endin
;Score
f1 0 32769 10 1 ; Sine
;Level in dB, 0dB=maximum
; Strt Leng Levl Freq1 Freq2
i1 0.00 1.47 -6 20 20000
e
The output from this contains a single sample -32768 spike about a third of
the way in for no apparent reason.
Anyone got any ideas?
Thanks,
Steve Cook.
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Date: Sat, 08 May 1999 16:41:46 +0000
From: Tobiah
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> #define PVMAGIC 517730 /* look at it upside-down, esp on a 7-seg display */
What is to be sought in the word 'oellis'?
Toby
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Date: Sat, 08 May 1999 16:06:39 -0400
From: Paul Winkler
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Steven Cook wrote:
>
> Hi,
>
> I've had an odd problem with the following simple orc and sco which I have
> written to test something else I am working on:
>
> ;Orc
> sr = 44100
> kr = 4410
> ksmps = 10
> nchnls = 1
>
> instr 1 ; Sine sweep generator
>
> ilevl = ampdb(96 + p4)
> ifreq1 = p5
> ifreq2 = p6
>
> asweep expseg ifreq1, p3, ifreq2
> aosc oscil3 1, asweep, 1
>
> out aosc*ilevl
>
> endin
>
> ;Score
> f1 0 32769 10 1 ; Sine
>
> ;Level in dB, 0dB=maximum
> ; Strt Leng Levl Freq1 Freq2
> i1 0.00 1.47 -6 20 20000
> e
>
> The output from this contains a single sample -32768 spike about a third of
> the way in for no apparent reason.
>
> Anyone got any ideas?
>
> Thanks,
> Steve Cook.
Do you mean a single spike, and nothing else... or a swept sine with an
unexplained spike in it?
I ran your orc and sco with no modifications and got a swept sine
wave... couldn't find any spikes anywhere. Maybe something's wrong with
your version of csound? (I'm currently running unofficial linux version
v3.53.0.1b).
By the way, using a big ftable like that, you won't see much benefit
from using oscil3. Just out of curiosity, I tried it with a table of
only eight points. If you have a sound editor that can open 4-channel
files (I use Snd on linux; on win95, maybe CoolEdit? I don't know.), you
can see clearly the difference in the output of the different oscils.
More importantly, you can hear them. With a more reasonable size of
ftable, the differences won't be as dramatic.
;Orc
sr = 44100
kr = 4410
ksmps = 10
nchnls = 4
instr 1 ; Sine sweep generator
ilevl = ampdb(96 + p4)
ifreq1 = p5
ifreq2 = p6
asweep expseg ifreq1, p3, ifreq2
aosc1 oscil ilevl, asweep, 1
aosc2 oscili ilevl, asweep, 1
aosc3 oscil3 ilevl, asweep, 1
outs aosc1, aosc1, aosc2, aosc3
endin
;Score
f1 0 8 10 1 ; VERY ROUGH SINE
;Level in dB, 0dB=maximum
; Strt Leng Levl Freq1 Freq2
i1 0.00 1.47 -6 20 20000
e
--
------------------- paul winkler --------------------
slinkP arts: music, sound, illustration, web design, etc.
zarmzarm@erols.com http://members.tripod.com/~slinkP
=========================================================
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Date: Sun, 09 May 1999 01:32:02 -0400
From: Patrick Pagano
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Hi Folks
many thanks to you all for help on Delay and reverb(especially Tobiah)
got them both working !!!!
what I am trying to do know is to get a looping delay functioning heres
my files
sr = 44100
kr = 4410
ksmps = 10
nchnls = 2
gasig init 0
instr 1
idur = p3
iamp = p4
iattack = p5
irelease = p6
irvbtime = p7
irvbgain = p8
ifqc = p9
kamp linen iamp, iattack, idur, irelease
asig oscili iamp,ifqc,1
arampsig = kamp * asig
aeffect reverb asig, irvbtime
arvbreturn = aeffect * irvbgain
gasig=gasig+ arampsig+arvbreturn
endin
instr 99
kDelaydecay init .4;;;;;;;;;;;;;;;do I
add it here??
iDelaytime init 1;;;;;;;;;;;;;or here???
asig7 delayr iDelaytime
delayw kDelaydecay * (gasig+
asig7);;;;;;;;;;do i need to add a deltapi????
outs asig7 + gasig,asig7
+gasig
gasig = 0
endin
f1 0 8192 10 1 ;GEN10 Sine Wave
; p1=Instr p2:Start p3:Duration p4:iamp p5:iattack p6:irelease
p7:irvbtime p8:irvbgain p9:ifqc
i1 0 28 40 0.2 0.2 2.3 0.1 512
i1 1 27 25 0.5 0.6 2.5 0.5 567
i1 2.222222 26 20 0.4 0.2 1.7 0.2 588
i1 4.444445 24 40 0.1 0.1 1.3 0.1 756
i1 6.666667 22 30 0.1 0.2 1.9 0.2 768
i1 8.888889 20 40 0.4 0.2 1.4 0.2 784
;;;;;;;;;LaMonte Youngs Well Tuned Piano Frequencies
i1 11.11111 17 30 0.2 0.1 1.4 0.1 896
i1 13.33333 15 40 0.5 0.1 2.1 0.1 1008
i1 15.55556 13 40 0.4 0.1 1.2 0.1 1024
i1 17.77778 11 60 0.4 0.2 2.5 0.2 1134
i1 18.33333 10 60 0.5 0.1 2.1 0.1 1152
i1 19.55556 10 40 0.4 0.1 1.2 0.1 1344
i1 19.77778 10 40 0.4 0.2 2.5 0.2 1512
i1 20 10 40 0.1 0.1 1.4 0.1 1536
i99 0 30
e
;;;;;;;;how do i go about this
Any help is always appreciated
Pat
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Subject: Re: Reverb quest, again
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I wrote:
> Yeah, I've been using DAP as well. It's really nice, though there are
> some basic interface design things that really bug me (all those damn
> windows!) It has three reverb types -- Moorer, Schroeder, and Multi-Tap.
> I think the Moorer sounds pretty good, but using it on a five-minute
> file (which I want to do here) is enough to kill me.
Actually it was the Multi-Tap mode I was thinking of. It sounds smoother
than any reverb orc/sco I've heard in Csound yet except convolution.
Might be worth trying to read the source and translate it to Csound...
but I don't know when I'd ever have time for that.
I've been doing convolve in the past few days, and it really sounds
quite good, even with less-than-pristine impulse recordings such as I
can make myself by popping balloons. I just spent part of today down in
the basement doing that... I ran out of balloons before I got the hang
of it, but I did try convolution with some of the files I did get and
it's quite remarkable. And slow... it'll take some serious
next-generation hardware to get convolve in the realm of realtime.
To anyone wishing to try it, I found this file is really quite nice (if
a big download):
http://wwwvms.utexas.edu/~fredrics/domkyrkan1.aiff
Note that something seems to be wrong with the file-- I had to try
opening it with a few different apps before I got it to read OK. And it
seems to be truncated at 4.6 seconds, after which there's a whole lot of
silence. I smoothed out the ending by mixing in a little artificial
reverb of the real reverb, and chopped the silence.
Here's an orc and sco:
; orc based on example in manual by Greg Sullivan
; NOTE: sr should equal sr of convolve file for best results!
sr = 44100
kr = 441
ksmps = 100
nchnls = 2
instr 1
iwetmix = 0.012 ; Wet/dry mix. Vary as desired.
; I've found that very low levels of wet signal are
; adequate.
idrymix = 1 - iwetmix
ivol = .7 ; Overall volume level of reverb. May need to adjust
; when wet/dry mix is changed, to avoid clipping.
iwetmix = iwetmix * ivol
idrymix = idrymix * ivol
adry1, adry2 soundin "file_you_want_to_effect"
awet1, awet2 convolve adry1,"domkyrkan1.cv" ; convolved (wet) audio
;;; for domkyrkan1.cv:
;;; actually I think I accidentally truncated the sound by a bad
;;; download, so it may be a longer delay time is needed!
;;; See the manual!
idel = 4.6
; Subtract impulse response initial delay from idel...
; you can also use this to increase the reverb pre-delay,
; jusr remember that bigger idel makes dry sound LATER.
; I assume .04
idel = idel - .04
adry1 delay idrymix * adry1,idel
adry2 delay idrymix * adry2,idel ; Delay dry signal, to align w
; convolved signal. Apply level
; adjustment here too.
outs adry1+iwetmix*awet1 , adry2+iwetmix*awet2
endin
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From: richard
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Hello. I've just subscribed and it was suggested that I introduce myself =
re csound ab/usage. I've been using csound for around 3 years now on the =
pc platform. I've been using the John Fitch version and he has been very =
helpful in giving me some pointers during my pre-web-access days. Thanks =
John. I use Csound "as is" because I have no C programming skills.
=20
Most of the stuff I've produced has amounted to a catalogue of fragments =
awaiting a form but I'm fairly pleased with a body of work which is =
available from me on cd if your interested. Contact my "distributor" - =
William Edmondes at will@unsoundauto.demon.co.uk for info. The cd =
includes my first 'serious' piece called "oboe 1997" which features =
Thomas Davey on oboe and is essentially a transfiguration of recordings =
made from a score written originally for flute. Three more recent works =
precede this on the disc and are probably more characteristic of where =
my head is at the moment.
My web site, which is lacking sound at the moment, can be found at =
http://www.simulacrum.freeserve.co.uk=20
Many thanks,
Richard
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Hello. I've just subscribed and it was suggested =
that I=20
introduce myself re csound ab/usage. I've been using csound for around 3 =
years=20
now on the pc platform. I've been using the John Fitch version and he =
has been=20
very helpful in giving me some pointers during my pre-web-access days. =
Thanks=20
John. I use Csound "as is" because I have no C programming =
skills.
Most of the stuff I've produced has amounted to a =
catalogue of=20
fragments awaiting a form but I'm fairly pleased with a body of work =
which is=20
available from me on cd if your interested. Contact my "distributor" - =
William=20
Edmondes at will@unsoundauto.demon.co.uk=
for=20
info. The cd includes my first 'serious' piece called "oboe 1997" which =
features=20
Thomas Davey on oboe and is essentially a transfiguration =
of recordings=20
made from a score written originally for flute. Three more recent works =
precede=20
this on the disc and are probably more characteristic of where my head =
is at the=20
moment.
My web site, which is lacking sound at the moment, =
can be=20
found at http://www.simulacrum.free=
serve.co.uk=20
Many thanks,
Richard
------=_NextPart_000_0065_01BE9A16.56E10CA0--
|