it works!!. sortof.

[Harry Bissell]

Do you mean when you hold two notes at once... you get a note inbetween
???
This is a feature of the design... nothing wrong with the trimmers...

I had a problem like this, but in my KBD design I shunt the resistor
string to ground. Don't get to lower than ground... eh ???

So when another note is played, the one that is closest to the constant
current source has priority... low note in my case.

This can be adapted to play two notes at once... by looking at both
sides of the resistor string...

BTW: I have a two contact per key design... but the technique could
apply to the one note design also...

:^) Harry

Roel Das wrote:

> Now i got the VCO and the keyboard working correctly.
> Next thing: the VCO is "VCO 3b 2N3904 version" from
> tomg's cookbook. There are 3 trimmers on it, named
> range, scale and High scale. What is the use of them?
> How and in which order should i adjust them?
> And WHY?? (I want to learn.)
> When i play 2 half notes on the keyboard, the notes
> from the oscillator change about a third. I probably
> have to correct this with the trimmers? Doesn't seem
> work? (haven't tried that hard, but still...)
>
> And one more final question; how can i be sure not to
> KILL my (guitar) amp when i plug something in? Any
> precautions or anything?
>
> Thanks alot.
> Everyone.
> I would never have the thing beeping without you guys.
>
> Roel
>
> =====
>
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