[sdiy] LFO control - frequency or time?

[David G. Dixon]

My vote: Time



> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
> bounces at dropmix.xs4all.nl] On Behalf Of Neil Johnson
> Sent: Monday, June 01, 2009 3:22 PM
> To: sdiy DIY
> Subject: [sdiy] LFO control - frequency or time?
> 
> Hi all,
> 
> Ok, here's a good point for discussion:
> 
> In my latest design on the bench I have a VCLFO which so far has a
> range of about 125us (8kHz) to roughly 120s (8mHz).  I think it could
> go even slower, but so far I don't have the patience to sit there
> with an hour-glass and time it.
> 
> So I got to thinking: for a CONTROL oscillator is it more useful to
> think, and program/use/set/twiddle, in terms of TIME (how long a
> cycle takes) or use the same concept of FREQUENCY as for the audio
> oscillators?
> 
> I open the debate with the view that it should the TIME - for a
> slowly-varying control signal I think it makes more sense to think in
> terms of how long a modulating cycle will take.  Saying
> 	"I want a slowly varying modulation over 54 seconds"
> seems more natural and intuitive than saying
> 	"I want a slowly varying modulation rate of 18.5mHz"
> 
> Comments welcome!
> 
> Cheers,
> Neil
> --
> http://www.njohnson.co.uk
> 
> 
> 
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