[sdiy] JX3P Metal Sync (was Re: Idea - Triangle wave DCO core)

[Mattias Rickardsson]

 On 14 Mar 2012, at 13:19, Florian Anwander wrote:
>> Florian, have you ever worked out how the "Metal" setting on the JX-3P
>> works? I haven't sat down and figured it out, but I'm guessing it's
>> something like that the master resets the slave's integrator state but
>> doesn't reset it's digital counter as well. Or maybe the other way
>> around: The master resets the slave's digital counter, but doesn't reset
>> the integrator state back to zero?
>
> In the schematics there are two controlling signals: the signal 'Sync' enables the reset of the programmable counter of the slave DCO. The signal 'Met/Syn' enables the reset of the integrator of DCO2 by the counter of DCO1. I never checked that in the real synth, but considering the naming of those two control signals it is most likely, that sync causes a reset of both, counter and integrator, while metal causes only the reset of the counter.

The other way around - the integrator is reset but not the counter...
otherwise I guess strange things would happen as the ramp goes higher
than normal? :-)

On 14 March 2012 16:34, Florian Anwander <fanwander at mnet-online.de> wrote:
>
> it should be also be possible to insert any modulation-CV to the integrator.
> In the JX-3P voice circuit diagram replace R134 at DCO1 by a CV mixer...

Is that perhaps done in the JX-8P? IIRC, there is some 4-position
switch on the PG-800 called "cross-mod 0-1-2-3"... what is it called
on the synth's display?

/mr