Subject: Re: [linux-audio-dev] [ann] preamp.so
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Tue Nov 12 2002 - 13:44:49 EET
On Mon, Nov 11, 2002 at 11:21:22 +0100, Tim Goetze wrote:
> pleased to announce another ladspa unit - 'preamp'.
>
> this plugin implements an amplitude response that has
> been obtained from a spice simulation of the preamp
> stage of a modified fender 5F4 instrument amplifier.
Hey, this is great!
Instead of a table lookup, have you though about using a high order
polynomial aproximation? That was what I was planning for the 12AX7.
It doesn't look like that complicated a shape, 5th or 6th order should do
it and it will be faster and less cachey than a high order interpolated
table lookup.
I'd be interested to see a plot of Vin in [-1,1], it looks like at
Vin = -0.5 it's starting to curl back on itself, which is interesting.
- Steve
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