[sdiy] Thoughts on a Polyphonic Synth

[Aaron Lanterman]

On Fri, 24 Mar 2006, Tom Arnold wrote:

> How could you autotune/autoscale a standard sawtooth core VCO?  I suppose
> there are the not so nice ways like using electronicly controlled resistors.

The OB-Mx uses several - uhm, I forget the company now, Xicor or Xicon or 
something - digital controlled resistors for tuning the VCOs and the 
VCFs.

Of course, it's a rare day that the OB-Mx plays fully in tune over its 
whole range.

> voltage.  A lookup table per note isnt, IMHO, the best way to do this
> because that wont work well for odd things like microtonal.  Well, unless
> your lookup table is rather large...

- Aaron

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