Korg Poly800/EX800 Users

So!  The interesting results from last night's experimenting is... I like
my "mistake" better :)

It sounds like you get less of the filter cutoff range if you do it the
"right" way.  I couldn't get the filter to do the whole subsonic -
infrasonic sweep that I showed off in my demos, or the vowel sounds.

So as soon as I was done testing the intended mod, I put mine back to the
wrong way :)  The sounds are just cooler.  I'd invite others to try it
out and see what they like.  (There is also a photo up of the "right way"
now.)


I think I've nailed down the other issue with some notes not being
affected.  As I suspected, in 8-voice mode you don't get the FM effect if
the CPU decides to use DCO 2.  For instance, playing a run you get 4 notes
with FM follwed by 4 notes, no FM.  In 4 voice mode you don't have this
problem.  I also tested it by bridging r74 to r76 (summing the outputs
of the DCOs) and that fixed the note skipping.

There must be a place further down the line where we can take the full
audio signal and use that as the modulation source?

Tim


On Tue, 11 Apr 2006, Atom Smasher wrote:

> On Tue, 11 Apr 2006, Tim Bieniosek wrote:
>
> > With the filter in self-oscillation you get real "FM" sounds.  Without
> > being able to precisely scale the filter keyboard tracking it's not
> > really playable, but it is great for sfx.
> >
> > With resonance down there is the potential for more musical, playable
> > tones I would describe as grungy, especially with filter cutoff down as
> > well.  With cutoff halfway up I could get some tones reminiscent of a
> > cello or a human voice.
> >
> > I recorded sounds and took pictures last night, I'll try to get them up
> > tonight.
> >
> > One thing I noticed is that the effects seemed to come and go on every
> > 3rd or 4th key?  I'm not sure if this is just a product of the
> > frequencies involved?
> ==================
>
> that's odd.... does it seem to do that on different patches with different
> filter settings?
>
>
> > Trying to understand the schematics on the web is a pain, so I'm
> > wondering what's the difference between r74-pin 7 of IC4 that we're
> > using and r76-pin 7 of IC5 that we're not?
> ===================
>
> from memory... IC5 operates on DCO2, which isn't always available. IC4
> operates on DCO1 which is always available.
>
> note that you can use this mod even if DCO1 level is 0.