| subscribers of both lists, excuse me for the cross-posting!
Hi all,
somebody knows where can i find some documentation on mutes? (for trumpets,
trombones etc): i.e. what kind of filter they perform, what are their
formants (if this is the correct term for mutes) and so on... Everything
could be useful for doing a mute simulation with some synthesys language
(like csound or super-collider)
I am searching links or books.
TIA
Maurizio
_____________________________________________
o Maurizio Giri o
o ConTempo o
o Italian Contemporary (and Early) Music o
o http://www.axnet.it/contempo o
o-------------------------------------------o
o ConTempo e-mail: contempo@wmail.axnet.it o
o Personal e-mail: m.giri@agora.stm.it o
o o
o Snail: Via Ostilia, 55 - 00184 Roma Italy o
o Tel +39.6.70451885 o
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Subject: Re: mutes simulation
To: Csound mailing list
Date: Wed, 17 Dec 1997 12:24:53 -0500 (EST)
From: Eli Brandt
In-Reply-To: from "Maurizio Giri" at Dec 17, 97 02:41:04 pm
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Maurizio Giri wrote:
> somebody knows where can i find some documentation on mutes? (for trumpets,
> trombones etc): i.e. what kind of filter they perform, what are their
> formants (if this is the correct term for mutes) and so on...
The folklore, at any rate, is that a trumpet mute is a lot like a
one-pole highpass.
--
Eli Brandt | eli+@cs.cmu.edu | http://www.cs.cmu.edu/~eli/
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Date: Wed, 17 Dec 1997 16:40:04 -0600
From: pete moss
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To: rasmus ekman , csound
Subject: Re: rates
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i would also like to add that A and K rates usually seem to be assigned
variables that are series (or arrays). I rate variables are generally just
one number.
example:
ivar = 4.5
avar oscil 1000, 1000, 1
kvar oscil 1000, 1000, 1
pete
rasmus ekman wrote:
> David Schuyeteneer wrote:
> >
> > Can someone please explain me very clear and exactly what those
> > weird A -, K - and I - RATES are ???
>
> A-rate in Csound means audio rate, ie generated soundfile sample rate.
> Sample rate in a digital sound file decides the sound quality.
> Common values are: 44100 Hz (CD rate), 22050 Hz (usually ok when testing
> an instrument), or 8000 Hz (web .au files - only good for speech)
> K-rate means "Control" rate. The ear cannot detect most musical changes
> (like pitch change) at a very high rate. Csound saves computing time by
> updating many variables at a slower rate. For most purposes 1/10th or
> even 1/100th of audio rate will do fine. At lower rates the stepping in
> the variable changes will be too annoying.
>
> I-rate is for init time. This is not properly a rate, it's for setting
> a variable to an initial value when an instrument begins playing.
>
> Regards,
>
> re
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Rasmus Ekman wrote:
>Metasynth runs on PowerMac only.
But you better have more than 16mb RAM folks.
Cheers
Arne
"You people have been throwing shit at me for years. Now it's starting to
fertilize!"
Edgar Varese
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Disclaimer: The views expressed in these messages are not necessarily those
of Management.
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Date: Wed, 17 Dec 1997 16:33:34 -0800 (PST)
From: Mike Berry
To: pete moss
Cc: csound
Subject: Re: rates
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On Wed, 17 Dec 1997, pete moss wrote:
> i would also like to add that A and K rates usually seem to be assigned
> variables that are series (or arrays). I rate variables are generally just
> one number.
> example:
>
> ivar = 4.5
> avar oscil 1000, 1000, 1
> kvar oscil 1000, 1000, 1
>
> pete
>
This is basically wrong. There are some opcodes (like oscil)
which do not run at i rate. It would be meaningless to read an oscillator
just once at the beginning of a note. However, many other opcodes (e.g.
the various random generators) are often used at i rate. There is no
correlation between the number of arguments an opcode takes and its
available rates.
(addendum: There are possible uses for a instrument rate oscil, but in
Csound, this would be part of the score, not the orchestra)
Mike Berry
mikeb@nmol.com
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I received this directly from Jim, but it clearly relates to my, and
most people's, postings, so I think it is a matter of general concern to
others on this list. Clearly I am guilty as charged, but so are most of
us, as we quite naturally tend to do the opposite, and sometimes embed
comments inside the copied message - especially 'natural' in reply to
the more elaborate postings with multiple questions or observations.
I have no answer to the question about the < sign - can anyone help?
Richard Dobson
Jim Stevenson Ph.D wrote:
>
> Hi.
>
> I appreciate your posts, and find them valuable.
>
> When reading with speech or Braille display, it is much easier to
> have the new comments before the quoted material from previous posts.
>
> This is the preferred manner on lists where most use speech.
>
> If you know of a quick way without vocal eyes to jump to the first line that
> does not begin with > please let us know.
>
> Please understand that this message is not an attack, but a polite request,
> attempting to make the list more speech friendly for all.
>
> Thanks for your consideration.
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Date: Thu, 18 Dec 1997 12:57:43 +0100
From: rasmus ekman
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To: csound
Subject: Re: rates
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Mike Berry answered pete moss:
>
> On Wed, 17 Dec 1997, pete moss wrote:
>
> > i would also like to add that A and K rates usually seem to be assigned
> > variables that are series (or arrays).
> >
> > pete
>
> This is basically wrong.
Yes. I think the talk of "variables that are series" perhaps springs
from reading the manual on this topic. It says "prefixes k or a denote
control (scalar) and audio (vector) values..."
It should be added: "respectively" (this will actually become apparent
from the list that follows, but it's still a sloppy formulation).
Now this is informative for programmers, but perhaps less so for others.
Internally, Csound will work through its list of active orchestra
instruments at K(ontrol) rate. At each such pass, audio (a-rate data)
is generated, k-rate variables are updated (well, generated), the list
of instruments is maintained, etc.
Audio rate data is generated in small blocks inside each instrument.
Eg inside an oscil, if sr=44100 and kr=4410, then 10 samples will be
generated at each k-rate pass, using the current values of k-rate
variables.
This block of audio data is called a vector, or array.
And if an opcode takes a-rate input, it will use the values from such a
data block (vector), rather than one single value, to work out its own
a-rate data.
Hope this could be of help to somebody.
re
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From: Richard Dobson
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Recent versions of Winsound (certainly since 3.45) do use the Windows
Multimedia drivers, and Derek Pierce at Bath Spa University College has
told me he has no problems with the Pinnacle.
Winsound is, however, not very sophisticated in terms of enabling the
selection of a particular audio device, and just asks for the first one.
If your Win95 is set up to play through the Pinnacle as the default
audio device, then it ~should~ work.
If Media Player works with the Pinnacle, for example, then you probably
have an old version of Winsound before the MMcalls were added.
I'm not sure about the MIDI support, as I haven't tried it.
Richard Dobson
Laszlo Vecsey wrote:
>
> I dont have a soundblaster compatible soundcard (Its a Turtle Beach
> Multisound Pinnacle) and I'm guessing thats why I had trouble with
> -odevaudio and -Msbmidi.
>
> Is it possible to instruct csound or winsound to use the Win95 drivers for
> wavout and midi in?
>
> - lv
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