[sdiy] CV keyboard divider resistor precision

[Tom Arnold]

On Fri, Sep 09, 2005 at 11:49:18AM -0700, jays at aracnet.com wrote:
> I build a reference with decade divider for octives and 12 divider for notes reference. The dividers were ran into switches and then to a op-amp summer with unity gain on the decade divider and 1/10 gain on the 12 step divider. I used a low drift and accurate voltage reference, good op-amp and hand matched resistors.
> 

I didnt even think of dividing per-note. That could be usefull and I just
happen to have a switch that'd handle that nicely.

To save the matching pain I'll prolly just buy the .01% resistors tommorrow.
If I step down to .05% I can select from more values.  I have a Fluke bench
meter but I havent had it calibrated in a few months so I dont trust it to 3
decimal places right now.

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