Re: [linux-audio-dev] Re: Cheby amp code

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Subject: Re: [linux-audio-dev] Re: Cheby amp code
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Tue Nov 05 2002 - 00:31:37 EET

On Mon, Nov 04, 2002 at 11:10:14 -0800, Paul Winkler wrote:
> > For the record my current guess for an amp process is:
> >
> > .-> bandpass -> shaper -. .--- LP <--.
> > | | v |
> > input -> EQ? -+-> bandpass -> shaper -+-> delay -> EQ ---> output
> > | |
> > `-> bandpass -> shaper -'
>
> well, we'd have to try it and see :)
>
> the delay w/ lp in feedback - is that basically
> how you make a resonant lopass filter?

No, its a primitive cabinet simulator. Just model reflections off the back
wall. The LP represents absorbion in the fiberous stuff inside. I read
about the technique somewhere... music-dsp probably.
 
> > dont bother. The EQ? could be optional if you have enough bandpasses.
>
> Sure, if there is pre-shaper and post-shaper gain for each
> band then that's your EQ. Lot of parameters to control,
> though.

Well, they would be preset for given amp types I guess.

- Steve

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