On Fri, Nov 08, 2002 at 01:24:30 +0100, Tim Goetze wrote: > it may not be a true amp model, but to me ... it rocks.
Yeah it sounds really good. > i'm still pondering whether antialiasing is needed, and if so, > how to do it (fit in a windowed sinc where the signal hits > the clipping threshold? thoughts welcome). Instead of going into hard clipping with a threshold, you could do a two stage thing: if (x < low) y = x if (low < x < high) y = f(x) if (high < x) y = high where f(x) is some function such that f(low) = low, f(1.0) = high, f'(low) = 1 and f'(1.0) = 0 [I'm too lazy to solve it, but its only a quadratic] high is your old clip point, moving low towards high will increase the "hardness", moving it away will reduce aliasing. > for building a decent 'virtual amp', i imagine some combination > of Steve's excellent valve and valve_rect for a good, smooth > and warm lowish-gain tone, a bit of tunable eq and this kind of > hard-clipping for hi-gain, harsh distortion topped off with a > cabinet response will just about do it for me. Yup, thats sounds like its going to rule. Its not really fair to call the valve mine though, I just copied it from someones thesis! - Steve
