Korg Poly800/EX800 Users

>
> Yep today, I successfully built and installed the FM-800 mod with
> digital potentiometer control, the Moog Slayer and the 12/24 db filter
> selector.
>
> Initially testing was ear piercing squelches from the Moog Slayer.
> Wow, that self oscillation is a real speaker/ear killer.
>
> The 12/24 db switch I was not that impressed with. Why do people like
> it so much?
>
> The Fm-800 I have yet to test fully. Hopefully, will get to that over
> the next week or so.
>
> Mike.
>

To: korgpolyex@yahoogroups.com
From: korgpolyex800@...
Date: Tue, 20 May 2008 20:14:32 +0000
Subject: [korgpolyex] Re: AtomaHawk prototype built and working

Spent a bit more time on the FM-800 mod today. The effect only works
when you have high sustain set on the source DCO. I have used a
digital switch to allow selection of either DCO1 or DCO2 but it
doesn't work very well in Single DCO mode because it only modulates
the filter every second note. But we can change that so that an
extended parameter would determine if the source for the modulation
was automatically changed from one to the other DCO according to each
new note playing. Also, I noticed that with the digital pot set to
zero the signal from the DCO gets loaded down by the VCF so I will
have to buffer the signals with opamps before sending into the VCF.

I am still a little bemused with the 12/24db/oct filter since it just
seems to set a lower cutoff and not much else. I would be interested
to hear from other people who have done the 12/24 filter mod to see
how they got best results.

The moog slayer mod I did just bridged out the 10K resistor with
another 10K resistor (thus halving it to 5K). I didn't set up the
digital pot yet. The results are a little scary but workable. I
definitely think a digital pot is the way to go there.

Will keep you all posted as I proceed. And do let me know how you're
all going and any suggestions are always welcome.

Mike.

--- In korgpolyex@yahoogro ups.com, "patrioticduo" <patrioticduo@ ...>
wrote:
>
> Yep today, I successfully built and installed the FM-800 mod with
> digital potentiometer control, the Moog Slayer and the 12/24 db filter
> selector.
>
> Initially testing was ear piercing squelches from the Moog Slayer.
> Wow, that self oscillation is a real speaker/ear killer.
>
> The 12/24 db switch I was not that impressed with. Why do people like
> it so much?
>
> The Fm-800 I have yet to test fully. Hopefully, will get to that over
> the next week or so.
>
> Mike.
>

Give to a good cause with every e-mail. Join the i’m Initiative from Microsoft.

>
> Spent a bit more time on the FM-800 mod today. The effect only works
> when you have high sustain set on the source DCO. I have used a
> digital switch to allow selection of either DCO1 or DCO2 but it
> doesn't work very well in Single DCO mode because it only modulates
> the filter every second note. But we can change that so that an
> extended parameter would determine if the source for the modulation
> was automatically changed from one to the other DCO according to each
> new note playing. Also, I noticed that with the digital pot set to
> zero the signal from the DCO gets loaded down by the VCF so I will
> have to buffer the signals with opamps before sending into the VCF.
>
> I am still a little bemused with the 12/24db/oct filter since it just
> seems to set a lower cutoff and not much else. I would be interested
> to hear from other people who have done the 12/24 filter mod to see
> how they got best results.
>
> The moog slayer mod I did just bridged out the 10K resistor with
> another 10K resistor (thus halving it to 5K). I didn't set up the
> digital pot yet. The results are a little scary but workable. I
> definitely think a digital pot is the way to go there.
>
> Will keep you all posted as I proceed. And do let me know how you're
> all going and any suggestions are always welcome.
>
> Mike.
>
> --- In korgpolyex@yahoogroups.com, "patrioticduo" <patrioticduo@>
> wrote:
> >
> > Yep today, I successfully built and installed the FM-800 mod with
> > digital potentiometer control, the Moog Slayer and the 12/24 db filter
> > selector.
> >
> > Initially testing was ear piercing squelches from the Moog Slayer.
> > Wow, that self oscillation is a real speaker/ear killer.
> >
> > The 12/24 db switch I was not that impressed with. Why do people like
> > it so much?
> >
> > The Fm-800 I have yet to test fully. Hopefully, will get to that over
> > the next week or so.
> >
> > Mike.
> >
>

> how about a way to overdrive the vcf or vca?

--- In korgpolyex@yahoogroups.com, Atom Smasher <atom@...> wrote:
>
> so, do you think there's going to be a production run on the AtomaHawk?
> when should it be available?
>
>
> --
> ...atom
>
> ________________________
> http://atom.smasher.org/
> 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
> -------------------------------------------------
>
> "Simply stated, there is no doubt that Saddam Hussein now
> has weapons of mass destruction."
> -- Dick Cheney, 26 August 2002
>

----- Original Message -----

From: korgpolyex800

To: korgpolyex@yahoogroups.com

Sent: Sunday, May 25, 2008 9:11 PM

Subject: [korgpolyex] Re: AtomaHawk prototype built and working

Hi Atom,

I think the AtomaHawk kit should be ready within three months.

Since I have the prototype working, now I have to put the PCB design
together. The digital pots worked out really well.

The Fm-800 mod works excellent. Moog Slayer works too.

Now I need to test modulation of the chorus. And decide on any other
mod's that we can think of.

3 months is probably about right.

Mike.

--- In korgpolyex@yahoogro ups.com, Atom Smasher <atom@...> wrote:
>
> so, do you think there's going to be a production run on the AtomaHawk?
> when should it be available?
>
>
> --
> ...atom
>
> ____________ _________ ___
> http://atom. smasher.org/
> 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
> ------------ --------- --------- --------- --------- -
>
> "Simply stated, there is no doubt that Saddam Hussein now
> has weapons of mass destruction. "
> -- Dick Cheney, 26 August 2002
>

--- In korgpolyex@yahoogroups.com, "David Mochen" <davidmochen@...> wrote:
>
> Hi Mike
>
> Great job. I will order the kit some time, hope my iving in
Argentina won't be much of an issue.
> I'm still watering at the prospect of having a velocity-sensitive
and EG/LFO controlled oscillator pitch Poly 800...
>
> Thanks
>
> PS: my offer to help with Spanish translations, should you ever
consider non-English speaking customers, is still valid :)
>
>
> ----- Original Message -----
> From: korgpolyex800
> To: korgpolyex@yahoogroups.com
> Sent: Sunday, May 25, 2008 9:11 PM
> Subject: [korgpolyex] Re: AtomaHawk prototype built and working
>
>
> Hi Atom,
>
> I think the AtomaHawk kit should be ready within three months.
>
> Since I have the prototype working, now I have to put the PCB design
> together. The digital pots worked out really well.
>
> The Fm-800 mod works excellent. Moog Slayer works too.
>
> Now I need to test modulation of the chorus. And decide on any other
> mod's that we can think of.
>
> 3 months is probably about right.
>
> Mike.
>
> --- In korgpolyex@yahoogroups.com, Atom Smasher <atom@> wrote:
> >
> > so, do you think there's going to be a production run on the
AtomaHawk?
> > when should it be available?
> >
> >
> > --
> > ...atom
> >
> > ________________________
> > http://atom.smasher.org/
> > 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
> > -------------------------------------------------
> >
> > "Simply stated, there is no doubt that Saddam Hussein now
> > has weapons of mass destruction."
> > -- Dick Cheney, 26 August 2002
> >
>