On Wed, Oct 23, 2002 at 02:37:17 +0200, Tim Goetze wrote: > still i'm not convinced that a sine should only be compressed > if < 0 by valve_1209.so.
Well, the valve plugin is an aproximation of a single valve, a guitar amp has several if I understand correctly. To make distortion I generally use a softish valve followed by some stuff, followed by an inverter (to make the DC offset smaller), followed by some stuff, followed by a harder valve. That will give something roughly like the scope shot Paul posted after this. Stacking the valve plugins is the key to making them sound interesting. As I have said before, if someone comes up with a chain of effects that sounds even vaguely like a guitar amp I will combine it into one plugin. That should be easier to use and faster. I dont think the sign of the signal will effect the sound of the output, just the appearance. Remember the DC offset and the phase shift. The valve plugin has none, I would expect a real valve to have a fair bit. It shouldn't noticably effect the sound though. > i've copied (950 + 50 silent) samples of each into > http://quitte.de/fender-sine.wave -- the quitte.de quota is Cheers. Just looked at it. It was what I was expecting from your description. > >Infact, this should just happen, if you use the crossover plugin and > >put the output through your speaker cone IIR you should see a similar > yup, it definitely looks more like it on the scope. but the > aliasing the crossover introduces is simply unbearable. i think > i'll go for a ride and show some waves to the guy who fixed my > fender amp recently, he knows a lot about the circuitry. The crossover plugin was a shot in the dark, based on a vague description of the effect by someone who understood the electronics. Now I have seen your recording, and have applied some brain power to it it's obvious what I did wrong, and how to fix it. - Steve
