Subject: Re: [linux-audio-dev] [ann] unmatched - a LADSPA amp tone
From: Paul Winkler (pw_lists_AT_slinkp.com)
Date: Thu Oct 31 2002 - 00:30:53 EET
On Wed, Oct 30, 2002 at 10:30:48PM +0100, Tim Goetze wrote:
> it seems hard to come up with a wave shaper that favours higher
> harmonics, i've tried some in the past few days.
maybe you're not filtering enough?
i was just reading about the Ibanez TubeScreamer circuit,
its clipping stage is quite interesting.
http://www.geofex.com/Article_Folders/TStech/tsxtech.htm
There's a pair of parallel diodes in the negative feedback
loop (rather than across the output), and there's
a cap and resistor in series from the neg. input to ground
forming a highpass filter (that is, there's less negative
feedback from high freqs so the circuit gets higher gain
at high freqs).
The filter is at about 750 Hz.
--Paul Winkler http://www.slinkp.com "Welcome to Muppet Labs, where the future is made - today!"
This archive was generated by hypermail 2b28 : Thu Oct 31 2002 - 00:36:26 EET