[sdiy] Moogey jitter

[Aaron Lanterman]

On Mon, 17 Apr 2006, David Cornutt wrote:

> 1.  Set output variable to minimum value
> 2.  Output a sample
> 3.  Add a fixed increment to the output variable

Gotta be careful with that at higher frequencies since some of higher 
harmonics can get aliased down. (I did a lecture on that where I used 
MATLAB to make obnoxious aliased waveform noises at my class. Come to 
think of it, I need to update the lecture link page.) There's a discussion 
of that in Hal Chamberlin's book. For such a low frequency it's probably 
not a big deal.

> http://home.hiwaay.net/~cornutt/Music/Web%20Page/sawtooth1a.wav
>
> in tone 3, and in tone 4 I can start to pick out pitch deviations.  (I 
> was surprised at how little deviation resulted in audible artifacts.) 
> However, I would not in any case describe the effect as "phat" or 
> "warm".  In fact, I'm not

Huh, I hear it too, on 3 and definitely on 4.

I'd describe it as the pitch deviations my MS-20 makes when I put varying 
degrees of pressure on some of the keys. ;)

- Aaron

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