Subject: Re: [linux-audio-dev] [ann] unmatched - a LADSPA amp tone
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Sat Oct 26 2002 - 21:48:04 EEST
On Sat, Oct 26, 2002 at 08:08:29 +0200, Tim Goetze wrote:
> >I didn't, it came from a paper, one of the COST6 ones I think.
>
> can't seem to find a trace of cost6 with google. do you
> remember where you dug it up?
I think I've found it, Ragnar Bendiksen's thesis:
http://www.notam02.no/~rbendiks/Diplom/Kurveforming.html
but it doesn't look that familiar, and I can't read norwegian, so maybe
there is a translation out there. Definately the same code though.
I just more than doubled its speed BTW (using Andrew Simpers pow(2,x)
aproximation and some hackery). I'm still not convinved that it should be
used for all the stages, I suspect a chebychev would be better for the
output, it would also alow us to model different amps with the same code.
We'd need to calculate the added harmonics from an amp though, maybe by
putting a sin through and FFTing it.
- Steve
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