On Sun, Nov 03, 2002 at 08:06:53 +0100, Tim Goetze wrote: > >> i'm not up to understanding all implications of the fact that the > >> incoming signal is not a pure sine; neither do i have a recipe for > >> preparing the coefficient tables -- if we scale the individual > >> coefficients by 1/sum their mix will not match what we want. > > > >I think we should probably abandon the cheby approach for now, this > >combined with the freqency dependency problem probably makes it a looser > >:( > > yep, it doesn't seem to be getting easier the more we look at it. > the above approach could bring us close, but it does need xfading > and two chebyshev shapers.
We'd also need to split up the incoming signal by frequency though, and that would make it expensive to run. > been thinking about how to do a hard clipper with sinc some more > today, without real results though. Yeah, I think thats difficult, and probably not neccesary, the "hard clip" from a guitar amp doesn;t look very hard to me, so I recon you could just apply the shaper, plus a bit of oversampling, a LP filter and it'd be fine. Remind me: what was the thing that put us off chains of models? Was it just the messy bottom end? Or was there more? I'm pretty sure I can fix the muddly low harmonics and it sounds like other people aren't modeling the variation in harmonic amplitude with signal amplitude, so maybe it isn't important. - Steve