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!"
