Discussion about the Korg PolySix synthesizer

That is one of the craziest pieces of hacking I have *ever* heard
about :-)

My polysix seems to have probs with its RESET mode too -
it used to get stuck in reset for several minutes,
and now is not liking the MIDI retrofit we're trying to
install...

If anyone has any more info on RESET problems, please let me
know...


----- Original Message ----- 
From: "Stefan Rinass" <st@rinass.de>
To: <PolySix@yahoogroups.com>
Sent: Friday, August 08, 2003 9:44 PM
Subject: Re: [PolySix] All led's lit up an then nothing moore
happens!!


> hi,
>
> i had the same problems on my two Polysix.Changed the 74LS08,
changed
> the DAC-Chip, changed nearly everything. Nothing worked. The
Knob
> Mainboard with the 4051\ufffds are ok.. As the result i think that
the 8048
> is/was defect.
>
> The Arp knob works with a own Clock source (a NE555 clock
source is
> located on the board which holds the knob and the other
arp-switches).
>
> At the end i gave it up, it was not worth to fix them. I study
currently
> how the other Boards work and i have also putted a C64 into one
Polysix
> and currently program a Synthesizer-Control program, first in
BASIC to
> see if all works corretly, then in Assembler.. Why not? The
Keyboard
> Connector fits really great into the C64\ufffds Keyboard Connector
(instead
> of read out the C64-Keyboard i read out pressed keys) , you
have to use
> three/four lines of the User-Port for Controlling the 4051\ufffds on
the Knob
> Board, you have two Paddle-Inputs to read out the Knob-Data and
the rest
> will be done with some external Chips. You have enough place
for the
> Voltage converter, you have Tape in-out on the back side of the
> Polysix-Case for connecting directly to the C64, you have
through the
> Arpeggiator a excellent 1-line Clock source, you can have also
> additonally a Video-out-signal to make show additionally a
little
> Sequencer andandand....the very basic Synth works already, of
course in
> a horrible response time (BASIC is slow, unfortunaly), but i
work on it.....
>
>   So i do my own Version of a C64-Syntehsizer. I call it
"Polythree" ;)
>
> Greetings
>
> stef.
>
>
> cjansson2003 wrote:
>
> >What happens when I power on my Polysix is this: All led's lit
up
> >steady except f\ufffdr the freq. led on the MW section. It starts
> >blinking
> >slowly and speeds up until it's a steady light. Another
exception is
> >the speed led on the arpeggiator section it blinks correct
according
> >to the speed set on the nob. I guess the the synth i s stuck
in the
> >reset mode witch should last a couple of seconds but I've
waited for
> >houers. Of cource there is no sound what so ever. If I
remember
> >correctly it started with a waiting time of a couple of
minutes and
> >gradualy got worse over time. I have tryed the repare of a
leaking
> >battery, and whas optemistic since there where at leased one
trace
> >damaged. After first repair it still would'nt work so i ended
up
> >replacing all traces around IC31 .... but no luck!
> >
> >So I'm hoping that anyone out there has a clue how to fix it.
Maybe
> >there is some components at the reset circutes that has to
changed.
> >
> >Thanks
> >
> >Christer
> >
> >
> >
> >
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> >
> >PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6
> >
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> >
> >
> >
> >
>
>
>
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