10 Oct
2002
10 Oct
'02
3:27 p.m.
On Thu, Oct 10, 2002 at 05:54:01PM +0100, Dave Griffiths wrote:
Yes, this is the problem, the CV value is linear with frequency, not
pitch (octaves). You define 0.0 to be a particular low frequency (say A0)
and then every +1.0 over that doubles the freqency, 1.0=A1, 2.0=A2 etc.
LFO's base frequencies are typically a few octaves down from ocilaotrs to
maintain sensible voltages.
The other
thing people should learn from CV sytems, is that frequency
is best represented as octaves, eg. 1volt (or 1.0f) per octave.
FWIW: In SSM the whole frequency range maps from -1 to 1 - so an un amplified
oscillator modulating another oscillator sweeps the entire range. This could be changed now, as the signals no longer
get clamped to that range.
It would throw off all the FM synth patches I have though :)
Well, FM /is/ done with linear-by-frequency ofcourse, but I glossed over
that ;)
- Steve