Looking for the Mod wheel on the schematic, I find it at the bottom-center of the page for the KLM-369, 370, and 371 boards. I see that the mod wheel is configured to directly attenuate the LFO signal prior to mixing in with the Bend signal. Based on this configuration it appears likely that the LFO signal is ground-referenced, meaning that the LFO signal swings both positive and negative. This is good.
To adjust the intensity, you can either add a pot to make the intensity adjustable, or you can just add a resistor de-sensitize your wheel by a fixed amount.
In either case, you'd disconnect the wire going to the top of the pot. For the fixed resistor, simply solder in the resistor between the wire and the pot. If you use a 10K resistor, you'll halve the intensity of the mod wheel. Easy.
For the potentiometer, connect the wire to the top of the pot. Connect the bottom of the pot to ground. Connect the wiper of the pot to the top of the Mod Wheel pot. That's not too bad, either.
If you use a pot, be careful about the value of the pot that you choose. I think that 220K is much too big. The total series resistance of the LFO/MOD path matters because of how its signal is passively mixed in with the signal for the bend wheel. I'm not sure what'll happen if, by adding the 220K pot, you add tons of series resistance. Maybe nothing will happen, maybe something weird will happen.
Personally, I'd simply use a 10K pot. And, since it's basically being used as a pitch control and not a volume control, I'd chose a linear pot over a log pot.
Good luck!
Chip
--- In PolySix@yahoogroups.com, "theofielb" <theofielb@...> wrote:
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> Hi there,
>
> I want to mod my P6 slightly by adding an intensity control for the modwheel, it is a little too much for my taste sometimes... I know I have to hook up a parallel potmeter, I will use a 220K log I think, but how do I have to hook it up? The modulation pot controls LFO and MOD, but I don't understand how...
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