[sdiy] Cheap Midi->CV

[Simon Brouwer]

Hi Michael,

At 21:12 6-9-2005, you wrote:
 > (...)
 > I like the "hit the bench" mentality - it's so DIY! If you can live with 
12 bits
 > check out Mr. Maddox and his now GPL PolyDAC.

I had thought that 12 bits would be plenty.

The AD8300 that Paul uses has a maximum integral nonlinearity error of 2 
LSB. Add to this a quantization error of 0.5 LSB. With a full scale of 10 V 
(10 octaves) that would amount to an error voltage of ca. 0.0061V, or 0.073 
of a semitone interval. With a full scale of 5 or 6 octaves the error 
voltage would be correspondingly smaller.

Do you think having more pitch accuracy than that would be worthwile?


Vriendelijke groet,
Simon Brouwer.

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