28 Oct
2002
28 Oct
'02
6:29 p.m.
On Mon, Oct 28, 2002 at 07:42:04 +0100, Tim Goetze wrote:
Not really. Both are freq (well, and amplitude) domain only.
The chebyshev is a way of generating specific harmonics, eg. you can
output the fundamental + the 2nd harmonic at -6dB, the 4th at -16, the 6th
at -21, etc. You can't easily control the phase though.
The harmonics track the source as you would expect, regardless of
frequency range (though aliasing is an issue, ofcourse).
I don't
know its hard to seperate phase effects from waveshaping, thats
why it needs FFTing. Onve we have the aproximate harmonic series we can
simulate that with a cheby, and if neccesary put the phase back with an
allpass or two.
ok, i'm slowly beginning to understand this i think. you mean
you plan to generate the harmonics with a time domain shaper
(like beloved valve_1209) and then 'shape the freq domain' with
the chebyshev? i don't think phase shifting will make a
difference (and if
it does, it's good to know you can fix it ;)
OK, then all I need to do is split out the distorted sinwave and load it
into octave. How Hard Can It Be(TM). ;)
Fix it is probably the wrong term, I can sort of bash it into compliance.
- Steve