Thanks for the info Tim
As far as the mod goes, I went with the on/off switch and the original pots. I measured the resistance carefully before removing them from the board. Its probably easier just to use fixed resistors and theres less chance of the "factory" setting changing. Setting the cutoff and resonance to an extreme setting and then switching the filter modes back and forth can yield some great results, especially during a sequence where one hand can toggle the switch while the other sweeps the cutoff.
Good luck with the mod. Its Sooooooo worth it :)
...Electrohead
--- On Wed, 2/11/09, serotonic_sound <sero-tonic@...> wrote:
> From: serotonic_sound <sero-tonic@...>
> Subject: [korgpolyex] Re: Jupiter vs Poly
> To: korgpolyex@yahoogroups.com
> Date: Wednesday, February 11, 2009, 5:11 PM
> The Jupiter-6 will self oscillate, the Jupiter-8 will not.
> The two
> boards have TOTALLY different filter sections.
>
> The 8 has a separate high pass and low pass section and is
> 12/24
> switchable (and the two modes sound totally different).
> The 6 has one
> multi mode filter (low/band/hi) and is fixed at 24db/oct,
> but the
> resonance range is much wider.
>
> In my opinion the filter section on the 8 is far superior.
>
> Actually Roland seemed to have made the range of EVERYTHING
> on the
> Jupiter-6 wider, which makes it quite twitchy to use, but
> you can get
> it to sound more "extreme". The Jupiter-8 seems
> to just sound good no
> matter what you do to it. Also the 6 is digitally
> controlled,
> oscillators, lumpier sounding lfo's...you can hear the
> difference
> instantly--The 6 lost much of that amazing organic sound
> the the 8 had.
>
> Yeah, totally different beasts...
>
> QUESTION:
>
> Back on track: I'm gonna do the poly-800 filter mod
> tonight or
> tomorrow, wish me luck...is it worth it to keep the factory
> pots in
> the circuit? What functionality will I lose exactly If I
> don't? I'm
> not too clear on how the new knobs interact with the patch
> settings,
> and what the old trim pots did, actually...
>
> When I do the 12/24 mod, I'll report back with how
> subtle the change
> is compared to Jupter-8's 12/24 switch, if anybody
> cares. ;)
>
> Peace,
> -Tim
>
>
>
>
>
> --- In korgpolyex@yahoogroups.com, Epiik Soul
> <electrohead2000@...> wrote:
> >
> > Im not sure if the Jupiters can self oscillate. Most
> info says yes,
> some users say no. Just out of curiosity, does anyone know
> for sure?
> > Even though Jupiters and Poly's both have 24db
> filters, I dont think
> they sound the same. With a Moog Slayer mod, they sound
> worlds apart.
> > As far as a comparison goes, its always apples and
> oranges. Every
> synth has something unique that makes it like no other.
> Theres
> probably some Jupiter6 sounds that the Jupiter8 cant quite
> get right
> and vice versa.
> > The same goes for any two synths.
> >
> > ...Electrohead - Patiently awaiting Mikes next batch
> of boards :)
> >
> >
> >
> > --- On Wed, 2/11/09, Michael Hawkins
> <korgpolyex800@...> wrote:
> >
> > > From: Michael Hawkins <korgpolyex800@...>
> > > Subject: [korgpolyex] Jupiter vs Poly
> > > To: korgpolyex@yahoogroups.com
> > > Date: Wednesday, February 11, 2009, 9:04 AM
> > > OK, I love the Poly but you are going to have to
> explain to
> > > me how the Jupiter-8 is not capable of making
> which sounds.
> > >
> > > What sounds can the Poly make that a Jupiter-8
> cannot?
> > >
> > > Do you have any recorded audio of these sounds
> that we
> > > could listen to?
> > >
> > > Mike.
> > >
> > >
> > >
> > >
> > > ________________________________
> > > From: serotonic_sound <sero-tonic@...>
> > > To: korgpolyex@yahoogroups.com
> > > Sent: Wednesday, February 11, 2009 3:47:25 AM
> > > Subject: [korgpolyex] Hello poly-800 world, my
> story, ( and
> > > missing joystick. :( )
> > >
> > >
> > > Hey folks, I'm really glad I found this
> forum! Nice
> > > work everyone.!
> > >
> > > EXECUTIVE SUMMARY: I love this synth! But,
> I'm missing
> > > the joystick and need some info
> > > on rigging up some resistors to run in tune
> without it.
> > >
> > > (Ok first, I'm not totally illiterate, just
> really
> > > excited by good/fun hardware synths)
> > >
> > > So, I recently was given a tattered old poly-800
> mk1 from a
> > > friend...Free is a really good
> > > price!
> > >
> > > I was really skeptical about this unit when I
> read about it
> > > and even more skeptical when I
> > > got my hands on it and was loading it into my car
> because
> > > it felt like a total cheap piece
> > > of sh∗∗t. Plastic unit with crappy buttons and
> that stupid
> > > programming reference stencil
> > > area that should have been filled with a million
> knobs and
> > > switches...anyway. ..
> > >
> > > I got it home, hacked together a power supply to
> turn it
> > > on...and you know the
> > > story...nothing, no sound....... ....oh wait if I
> hold the
> > > keys down I heard some kind of low
> > > fequency something coming in on a really slow
> envelope...I
> > > think...So I quickly referenced
> > > the manual, which amazingly was part of the deal,
> to put it
> > > into programming mode and
> > > set up everything to make a simple square wave,
> unfiltered,
> > > sane adsr settings...and sure
> > > enough...success. ..major success!!! It actually
> > > worked...nice!
> > >
> > > Oh dear, then I read about the battery issue in
> the
> > > manual....WHAT? NO INTERNAL
> > > BATTERY? You must be kidding me, seriously? come
> on...so I
> > > unplugged the dc power,
> > > plugged it back in, sure enough, everything was
> erased...no
> > > really, come on, really?
> > > seriously? come on korg...really? YES REALLY.
> > >
> > > First order of business 3v lithium mod... (THANKS
> > > GUYS!)...works like a charm... Yes one
> > > step closer to a "real synth"...
> > >
> > > Anyway, this synth, for certain applications,
> absolutely
> > > kills! I love it to death...the factory
> > > presets are ridiculously bad...seriously all of
> them (even
> > > patch 15 ;) This thing sounds
> > > best when you open it right up loud and pure...I
> REALLY,
> > > REALLY, love the oscillators on
> > > this thing...and the filter sounds really good,
> but I'm
> > > going to do the 12db mod asap, I
> > > don't like 24db filters personally for the
> music I
> > > make...I prefer the more acidy sound of
> > > 12db...
> > >
> > > I have a Jupiter-8 and a Juptiter-6, and I hate
> to admit
> > > it, but this thing will make killer
> > > sounds not possible on those two machines...very
> > > complimentary. ..Retro Electro
> > > madness!!!!! ...
> > >
> > > Maybe you can tell...I love old keyboards...
> > > YYEEEEAAAAAAAHHH HHHH... <happy dance>
> > >
> > > I'll upload some good "housey-technoy-
> elctroey-
> > > acidy-discoey- psy-ee" patches for
> > > everyone soon...
> > >
> > > Ok, long, long, story short. (Thanks for
> listening).. .
> > >
> > > THE REAL MEAT OF THIS MESSAGE:
> > >
> > > I'm missing the joystick unit completely, its
> not just
> > > broken, its gone, the whole unit... I
> > > can stare down the square hole and see the
> connectors
> > > hanging there.
> > >
> > > 1) I think the pitch of the unit is being thrown
> off
> > > because there's no resistance on the
> > > pitch mod joystick, it's sounds about 5 tones
> off,
> > > yeah?
> > >
> > > 2) Would somebody be kind enough to tell me what
> resistors
> > > I should wire up to what
> > > leads to simulate the joystick being in the
> center? Please?
> > > I'll buy you a case of beer or
> > > lunch, or write you a song, or something... I
> promise.
> > >
> > > 3) Does anybody want to sell me a joystick unit?
> or know
> > > where I can get one?
> > >
> > > Peace everybody, happy synthing... :) :) :) :) :)
> :)
> >