Korg Poly800/EX800 Users

Ran across something in the MarkII service manual recently...

Evidently the MarkII's have a few differences I wasnt aware of in it's parameters.

DECAY/SLOPE/RELEASE on the M2 are exponential slopes vs. the M1's linear slopes (M2's "Slope" will be linear if the Sustain Level is higher than the BreakPoint Level.)

Keyboard Multitrigger Mode is different too. If I understand the pictures in the M2 service manual correctly, additional triggers on a M1 start the EG from the very beginning again, on M2's they evidently start wherever you were in the phase of the EG that the first key began... so if you were in the middle of the decay slope and trigger an additional note, that 2nd note will restart the EG at the halfway point of the decay slope instead of starting the Attack slope from the beginning again.

Take a look at the M3 service manual to see what I'm talking about-

http://www.synfo.nl/servicemanuals/Korg/POLY-800II_SERVICE_MANUAL.pdf

So I'm kinda curios, which versions of the above does the HAWK800 have? M1's version or M2's?

I was thinking it might be kinda cool if you could choose between the M1's versions and the M2's.

-Blaine

OK, so M1 it is.. I kinda thought so by the sound of it.

So an orig. OS on a M2 will change to this type of EG system after a HAWK install.. thus changing the sound.
Ever notice the sound difference yourself with a HAWK and orig. M2 side by side?

I recall you said the EG's were tricky to "reverse engineer". I wasnt sure if you couldnt cut/copy/paste the EG code from one to the other without actually understanding how it worked.
Can you see the algorithms for the EG code? Or just havnt stopped to recreate in dec. written math from the decompiled firmware?

I recently buggered around with a graphical EG to illustrate an ADBSSR. It uses a script I copied from a code example.. the math in it is complex.. made me wonder if the Korg's ADBSSR had similar math going on in it.

--- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@...> wrote:
>
> The HAWK uses M1 EG's slopes and triggering.
>
> The *only* part of the original Korg code that I haven't been able to reverse engineer is the envelope generator operation.
>
> And due to economic concerns, I don't have the luxury of time to figure them out.
>
> Mike
>
>
>

OK, so M1 it is.. I kinda thought so by the sound of it.

So an orig. OS on a M2 will change to this type of EG system after a HAWK install.. thus changing the sound.
Ever notice the sound difference yourself with a HAWK and orig. M2 side by side?

I recall you said the EG's were tricky to "reverse engineer". I wasnt sure if you couldnt cut/copy/paste the EG code from one to the other without actually understanding how it worked.
Can you see the algorithms for the EG code? Or just havnt stopped to recreate in dec. written math from the decompiled firmware?

I recently buggered around with a graphical EG to illustrate an ADBSSR. It uses a script I copied from a code example.. the math in it is complex.. made me wonder if the Korg's ADBSSR had similar math going on in it.

--- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@...> wrote:
>
> The HAWK uses M1 EG's slopes and triggering.
>
> The *only* part of the original Korg code that I haven't been able to reverse engineer is the envelope generator operation.
>
> And due to economic concerns, I don't have the luxury of time to figure them out.
>
> Mike
>
>
>