5 Feb
2003
5 Feb
'03
9:08 a.m.
On Wed, 5 Feb 2003, David Olofson wrote:
Anyway, the reason for not using Hz or similar in the
API is that such
units are harder to deal with, pretty much no matter what you want to
do. The only exception is when you actually want to have some
periodic action driven by it, ie sound. Thus, rather than using Hz in
the API and having event processors and whatnot convert back and
forth, we use linear pitch (1.0/octave) throughout, and leave it to
the final stage; the synth, to convert it into whatever drives it's
Okay, that is some kind of answer. The needs of the event processors
outweigh the needs of the audio processors.
oscillators. Which, mind you, is not necessarily Hz
or
samples/period! It may well be coefficients for a resonant filter you
need.
I guess you'd still convert them to linear frequency on the way.
As to actually doing the conversion, I suppose we
could throw some
inline implementations into the plugin SDK.
Yes, a control iterator would be nice: something that takes a pitch ramp
event as input and then produces Hz values each sample as output.
--
Sami Perttu "Flower chase the sunshine"
Sami.Perttu(a)hiit.fi http://www.cs.helsinki.fi/u/perttu