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very lfo

Date1999-07-25 18:43
Frompete moss
Subjectvery lfo
anyone know why oscil and phasor wont work with very low frequency
oscillation?  i tried generating signals with periods of 100 to 600
seconds, but at those low freqs, the period gets stretched.  anything
below about .1 Hz starts to go wrong.  is this problem caused by the
single vs. double issue raised earlier, or is it a different problem. 
anyone know a different way to generate a very low freq signal with
correct period length?

:P

Date1999-07-25 22:45
FromRichard Karpen
SubjectRe: very lfo
Pete,

Your right and probalby this should be documented somewhere in the
csound manual. around 8-9 years ago I was using oscili for envlopes
over very long stretches of time such as you're doing and it took
me many long and frustrating days to figure out why I was not getting
the results I expected to get. No time right now to explain why this
happenes.

My quick advice: Use a phasor/table(i) pair instead of oscil(i) and you'll
get exactly what you want.

Richard



On Sun, 25 Jul 1999, pete moss wrote:

> anyone know why oscil and phasor wont work with very low frequency
> oscillation?  i tried generating signals with periods of 100 to 600
> seconds, but at those low freqs, the period gets stretched.  anything
> below about .1 Hz starts to go wrong.  is this problem caused by the
> single vs. double issue raised earlier, or is it a different problem. 
> anyone know a different way to generate a very low freq signal with
> correct period length?
> 
> :P
> 
> i am using consound 3.56 if it matters
>