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Message

Re: [korgpolyex] Re: Missing Joystick board (KLM-599) "mod"

2009-02-19 by Gordon J. C. Pearce MM3YEQ

On Thu, 2009-02-19 at 01:28 +0000, serotonic_sound wrote:
> > Zoinky is right that we need to use linear pots. What are all of the
> > markings on your pot's? When you move the pots through their full
> > rotation, does the voltage move smoothly or does it move slowly and
> > then at each end, suddenly jump up or down?
> 
> The pots I have are new 10K linear pots and they indeed look/feel
> linear when I measure them on my voltmeter.  I think all they say is
> "10K B" somewhere but I don't have them in front of me right now.

The pots on the joystick say 10K B.  I suspect they're 10k over a very
short swing though, because obviously they can't turn through a wide
angle.

> When I sent 0 to 5V through the pitch bend (1-5B).  The pitch bend
> went from down a fifth to normal at 12 o'clock, but did nothing for
> the rest of the range.  This happened with +5 connected, the wiper
> connected to 1-5B, and either ground or -5V to the other side.  And it
> did feel "smooth/linear" from far left to 12 o'clock.

Well, as I said, the X and Y pins definitely go from 0 to 4 volts, with
2 volts in the centre.

> What is the range (in musical terms) of the joystick?

Mine swings around 10 semitones.

Gordon

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