Discussion about the Korg PolySix synthesizer

Hello Johannes!

> I am not sure about what you mean with "the LFO mod", but I suppose
> that is a simple modification of the frequency range of the LFO by
> changing a resistor or cap (C19 of KLM-367 is the timing capacitor
> of the LFO circuit). It will be then still controlled by the saved
> patch setting.

Yes, that is exactly the mod I have in mind. There's a resistor somewhere
which can be
changed to obtain a faster frequency. But I was considering making a switch
somewhere
so I can have both normal LFO range and audio frequency range - that is not
a permanent
change. Will the patch still recall the fast frequency if the switch is in
normal range position
do you think?

> > The thing is I have made a number of sounds that really depend on the
> > arpeggiator, and unfortunately the arpeggiator setting are not saved
> > as part of a patch. They are obviously considered sort of 'performance
> > .....
>
> If you really want, you can make the ARP speed programmable, too. The
> ARP clock is generated by an 555 timer. The 555 in astable mode can
> be voltage controlled on pin5, which is bypassed in the Polysix
> (btw. the 555 resides on KLM-371, under the front panel, directly
> beneath the ARP speed control knob). The data book says that the
> ...

It's an interesting mod, but is still a workaround. The ARP speed is not the
only parameter that needs
to be remembered. One of my patches depend on a very fast ARP speed, and the
switch in 0 octaves
position (in which case the up/down doesn't matter). That way I can make
certain sounds that I have
heard Richard Barbieri do on a Prophet 5. Other sounds may also need
programming of the up/down
switch as well. I also have some sounds where the relative frequencies of
the ARP LFO, normal LFO
and PWM LFO provide sub-frequencies that can be used for even more very
interesting sounds.
Essentially what I am always trying to do is to achieve different kinds of
intermodulation between the
LFOs, so full programmability of all three would have been fantastic, but is
probably not possible
without ripping the whole thing apart and rebuilding it. It would be even
cooler if it could remember
intervals played from the chord button.
Well, one is always allowed to dream.....

Cheers

Frank Carvalho



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