[linux-audio-dev] [ann] unmatched - a LADSPA amp tone

[Paul Winkler]

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!"