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

[Paul Winkler]

On Wed, Oct 23, 2002 at 02:37:17PM +0200, Tim Goetze wrote:
> still i'm not convinced that a sine should only be compressed
> if < 0 by valve_1209.so.

I'm not either. Tubes don't do that.
Tube distortion is famous for emphasizing even harmonics, but
it certainly isn't *all* even harmonics.
A bit of googling turns up some oscilloscope shots of
tube clipping such as these:

http://www.ax84.com/pdr/18watterbuzz.html#ResistiveLoad

Notice that while the clipping is certainly asymmetrical,
it's certainly NOT one-sided.

This is also worth considering, by a guy who's put a lot
of time into building analog (solid-state) tube amp
simulators:
http://home3.netcarrier.com/~lxh2/distampt.html

--PW


Paul Winkler
http://www.slinkp.com
"Welcome to Muppet Labs, where the future is made - today!"