| Richard Wentk wrote:
>
> I've been using a Pentium 133 for the last year or so, which is just a
> little too slow for the kind of things I've been attempting with > Csound...
Have you considered Digital's Alpha architecture? A PC164
motherboard and 500MHz-21164 cpu for NT/Linux can be bought for
$2,900. That has SPECfp95 of 13.7 compared to 6.7 on PPro 200MHz
(most clone makers list 20.4, but that's for DEC's Alphastation,
$26,000). Also, this
summer 21164PC will be available, suposedly for $2,600/system at
17.0 SPECfp95.
GB
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From: Gregory Boduch
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To: csound@maths.ex.ac.uk, Marc Resibois
Subject: Re: Benchmarks
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Marc Resibois wrote:
>
> Don't forget that you then rely on someone having a compiler to have
> Csound up and running...
What do you mean, will gcc/Linux not compile?
GB
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From: Marc Resibois
To: gb141 , csound
Subject: Re: Benchmarks
Date: Tue, 1 Apr 1997 22:51:18 -0000
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:
: What do you mean, will gcc/Linux not compile?
:
Mmm... might be. However, I would check if GNU does support the ALPHA/NT
combination before buying ;-)
Marc.
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Date: Tue, 01 Apr 1997 23:46:58 +0200
From: Josep M* Comajuncosas
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To: csound@maths.ex.ac.uk
Subject: Logistic equation
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I=B4d like to offer a nice instrument I make yesterday... it uses the
quite basic logistic equation to generate a waveform. To get different
pitches, I spend some time filling a table with the new R. Whittle
opcodes and then I resample it with linear interpolation (so you get
triangle waves...).
It could be improved... any volunteer? I=B4d like to get the pitches from
the equation itself (using the Feigenbaum constant to get the
bifurcation points, or somethink like that), but I don=B4t know how to
find them yet.
I=B4m currently working with continuous systems. They seem very much
attractive.
Josep M=AA Comajuncosas
gelida@lix.intercom.es
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sr =3D 44100
kr =3D 44100
ksmps =3D 1
instr 1
; LOGISTIC CURVE applied to sound generation
p3 =3D 2 * p3
ipitch =3D cpspch(p4)
iatt =3D .08; attack as percentage (%1) of table with chaotic behaviour
isize =3D ftlen(1)
kndx init 0
kx2 init 0.01
idur =3D isize/sr
ichaos =3D 3.5699456; limit between periodic and chaotic behaviour
ku linseg 4, iatt*idur, ichaos , idur*(1-iatt), 3
fill:
if kndx > isize kgoto contin
kx =3D kx2
kx2 =3D ku * kx * (1-kx);simple logistic (May) curve
tablew (kx2-.65), kndx, 1
kndx =3D kndx + 1
contin:
if kndx < isize kgoto endin
aphase line 0, 1000/ipitch, isize; not tuned yet!...
asig tablei aphase,1; <- you=B4ll get triangle waves at the end
out 20000*(asig)
endin:=09
endin
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f1 0 8193 10 1
f2 0 2048 10 1
i1 0 1 6.08
i1 3 2 6.08
i1 7 5 6.08
e
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