Korg Mono/Poly

Hi. I've got a problem with my mono\poly- it's completely out of
tune: for example the first "C" note is not like second "C" and
third "C" is more like "D"... So, can anyone tell me how to tune it?

"Open the top of your Mono/Poly. On the underside, dead center, is a
little brown PCB with "KLM-398" on it. There are four little silver
potentiometers on there- they each have a little slot in the center
where a jeweler's screwdriver will fit. Plug in your Mono and turn it
on, plug in some headphones, and you can turn those pots until all
the oscs are humming in tune."
I got this information at Zen mono/poly in my links section.


Make sure you turn one VCO up at a time. And also the tune knobs are
not in order. EX: turning tune screw one will not tune VCO 1. It will
take you alittle time to firgure out which one tunes which VCO. MAKE
SURE YOU DONT TURN THE WRONG KNOBS! there are other knobs in there
that are not for tuning. Be sure your turning the right ones.



--- In korg_mono-poly@yahoogroups.com, "mozgmozg23" <mozgmozg23@y...>
wrote:

>
>
> Hi. I've got a problem with my mono\poly- it's completely out of
> tune: for example the first "C" note is not like second "C" and
> third "C" is more like "D"... So, can anyone tell me how to tune it?

Now that I think about what you asked alittle more it sounds like
your in poly mode. When the mono/poly is in poly mode it plays
different VCOs when a new key is hit. To make sure it is in tune I
like to put the mono/poly in UNISON mode. I also put all the VCOs (1
through 4)on the same WAVEFORM and OCTAVE. Make sure the mono/poly is
on for about 30 minutes before you try to tune it. And make sure that
the tune knobs (right of the waveform knobs) are dead center. You
want to tune the MASTER TUNE first. If not all your work will be for
nothing. Turn VCO 1 LEVEL up all the way and the rest (VCOs 2-3) all
the way down. If i remember correctly the tune screw (located inside
the mono/poly on the board marked KLM-398) for VCO 1 is in the third
position. I could be wrong. After the first VCO is in tune to another
source (say another keyboard) you can tune the rest of the VCOs to
the first one. Turn VCO LEVELs 1 and 2 up. Find the turn screw for
VCO 2 and turn it intil it is in tune with the first VCO. . then tune
VCO3 to VCO1 then VCO4 to VCO1. I cant stress enough how important
it is to make sure that your on the board marked KLM-398. There are
other knobs inside the mono/poly that when you turn them it will mess
with the tuning. Make sure you dont turn them. If you do you will
need a digital volt meter to correct this. (Detailed instructions can
be found in the calibration manual)I hope these instructions are
clear enough. GoodLuck!!

--- In korg_mono-poly@yahoogroups.com, "analog_geek" <marsholie@h...>
wrote:

>
> "Open the top of your Mono/Poly. On the underside, dead center, is

a

> little brown PCB with "KLM-398" on it. There are four little silver
> potentiometers on there- they each have a little slot in the center
> where a jeweler's screwdriver will fit. Plug in your Mono and turn

it

> on, plug in some headphones, and you can turn those pots until all
> the oscs are humming in tune."
> I got this information at Zen mono/poly in my links section.
>
>
> Make sure you turn one VCO up at a time. And also the tune knobs

are

> not in order. EX: turning tune screw one will not tune VCO 1. It

will

> take you alittle time to firgure out which one tunes which VCO.

MAKE

> SURE YOU DONT TURN THE WRONG KNOBS! there are other knobs in there
> that are not for tuning. Be sure your turning the right ones.
>
>
>
> --- In korg_mono-poly@yahoogroups.com, "mozgmozg23"

<mozgmozg23@y...>

> wrote:
> >
> >
> > Hi. I've got a problem with my mono\poly- it's completely out of
> > tune: for example the first "C" note is not like second "C" and
> > third "C" is more like "D"... So, can anyone tell me how to tune

it?

Thanks for your help, but i asked 'bout little bit different
thing... My english is so bad, but i'll try to describe my problem
again to make you understand -)
So, i think, it calls "scaling" in english, the distance between C1,
C2, C3... And looks like the "scaling" on my mono/poly is really
bad.
For example: i press C1 note on mono/poly and it sounds like C on my
Quasimidi Polymorph, but C2 on mono/poly sounds like D note... Is it
clear?)





--- In korg_mono-poly@yahoogroups.com, "analog_geek"
<marsholie@h...> wrote:

>
> Now that I think about what you asked alittle more it sounds like
> your in poly mode. When the mono/poly is in poly mode it plays
> different VCOs when a new key is hit. To make sure it is in tune I
> like to put the mono/poly in UNISON mode. I also put all the VCOs

(1

> through 4)on the same WAVEFORM and OCTAVE. Make sure the mono/poly

is

> on for about 30 minutes before you try to tune it. And make sure

that

> the tune knobs (right of the waveform knobs) are dead center. You
> want to tune the MASTER TUNE first. If not all your work will be

for

> nothing. Turn VCO 1 LEVEL up all the way and the rest (VCOs 2-3)

all

> the way down. If i remember correctly the tune screw (located

inside

> the mono/poly on the board marked KLM-398) for VCO 1 is in the

third

> position. I could be wrong. After the first VCO is in tune to

another

> source (say another keyboard) you can tune the rest of the VCOs to
> the first one. Turn VCO LEVELs 1 and 2 up. Find the turn screw for
> VCO 2 and turn it intil it is in tune with the first VCO. . then

tune

> VCO3 to VCO1 then VCO4 to VCO1. I cant stress enough how

important

> it is to make sure that your on the board marked KLM-398. There

are

> other knobs inside the mono/poly that when you turn them it will

mess

> with the tuning. Make sure you dont turn them. If you do you will
> need a digital volt meter to correct this. (Detailed instructions

can

> be found in the calibration manual)I hope these instructions are
> clear enough. GoodLuck!!
>
> --- In korg_mono-poly@yahoogroups.com, "analog_geek"

<marsholie@h...>

> wrote:
> >
> > "Open the top of your Mono/Poly. On the underside, dead center,

is

> a
> > little brown PCB with "KLM-398" on it. There are four little

silver

> > potentiometers on there- they each have a little slot in the

center

> > where a jeweler's screwdriver will fit. Plug in your Mono and

turn

> it
> > on, plug in some headphones, and you can turn those pots until

all

> > the oscs are humming in tune."
> > I got this information at Zen mono/poly in my links section.
> >
> >
> > Make sure you turn one VCO up at a time. And also the tune knobs
> are
> > not in order. EX: turning tune screw one will not tune VCO 1. It
> will
> > take you alittle time to firgure out which one tunes which VCO.
> MAKE
> > SURE YOU DONT TURN THE WRONG KNOBS! there are other knobs in

there

> > that are not for tuning. Be sure your turning the right ones.
> >
> >
> >
> > --- In korg_mono-poly@yahoogroups.com, "mozgmozg23"
> <mozgmozg23@y...>
> > wrote:
> > >
> > >
> > > Hi. I've got a problem with my mono\poly- it's completely out

of

> > > tune: for example the first "C" note is not like second "C"

and

> > > third "C" is more like "D"... So, can anyone tell me how to

tune

> it?

I understand what you mean now. im really now sure how to do this. I
would at least check to see if the voltage is right on the boards.
It takes alittle time to understand the calibration manual but its
basically putting the positive and negative probes (from the digital
volt meter) on certain places on circuit boards and comparing the
number read out on the DVM to the number on the calibration manual.


--- In korg_mono-poly@yahoogroups.com, "mozgmozg23" <mozgmozg23@y...>
wrote:

>
> Thanks for your help, but i asked 'bout little bit different
> thing... My english is so bad, but i'll try to describe my problem
> again to make you understand -)
> So, i think, it calls "scaling" in english, the distance between

C1,

> C2, C3... And looks like the "scaling" on my mono/poly is really
> bad.
> For example: i press C1 note on mono/poly and it sounds like C on

my

> Quasimidi Polymorph, but C2 on mono/poly sounds like D note... Is

it

> clear?)
>
>
>
>
>
> --- In korg_mono-poly@yahoogroups.com, "analog_geek"
> <marsholie@h...> wrote:
> >
> > Now that I think about what you asked alittle more it sounds like
> > your in poly mode. When the mono/poly is in poly mode it plays
> > different VCOs when a new key is hit. To make sure it is in tune

I

> > like to put the mono/poly in UNISON mode. I also put all the VCOs
> (1
> > through 4)on the same WAVEFORM and OCTAVE. Make sure the

mono/poly

> is
> > on for about 30 minutes before you try to tune it. And make sure
> that
> > the tune knobs (right of the waveform knobs) are dead center. You
> > want to tune the MASTER TUNE first. If not all your work will be
> for
> > nothing. Turn VCO 1 LEVEL up all the way and the rest (VCOs 2-3)
> all
> > the way down. If i remember correctly the tune screw (located
> inside
> > the mono/poly on the board marked KLM-398) for VCO 1 is in the
> third
> > position. I could be wrong. After the first VCO is in tune to
> another
> > source (say another keyboard) you can tune the rest of the VCOs

to

> > the first one. Turn VCO LEVELs 1 and 2 up. Find the turn screw

for

> > VCO 2 and turn it intil it is in tune with the first VCO. . then
> tune
> > VCO3 to VCO1 then VCO4 to VCO1. I cant stress enough how
> important
> > it is to make sure that your on the board marked KLM-398. There
> are
> > other knobs inside the mono/poly that when you turn them it will
> mess
> > with the tuning. Make sure you dont turn them. If you do you will
> > need a digital volt meter to correct this. (Detailed instructions
> can
> > be found in the calibration manual)I hope these instructions are
> > clear enough. GoodLuck!!
> >
> > --- In korg_mono-poly@yahoogroups.com, "analog_geek"
> <marsholie@h...>
> > wrote:
> > >
> > > "Open the top of your Mono/Poly. On the underside, dead center,
> is
> > a
> > > little brown PCB with "KLM-398" on it. There are four little
> silver
> > > potentiometers on there- they each have a little slot in the
> center
> > > where a jeweler's screwdriver will fit. Plug in your Mono and
> turn
> > it
> > > on, plug in some headphones, and you can turn those pots until
> all
> > > the oscs are humming in tune."
> > > I got this information at Zen mono/poly in my links section.
> > >
> > >
> > > Make sure you turn one VCO up at a time. And also the tune

knobs

> > are
> > > not in order. EX: turning tune screw one will not tune VCO 1.

It

> > will
> > > take you alittle time to firgure out which one tunes which VCO.
> > MAKE
> > > SURE YOU DONT TURN THE WRONG KNOBS! there are other knobs in
> there
> > > that are not for tuning. Be sure your turning the right ones.
> > >
> > >
> > >
> > > --- In korg_mono-poly@yahoogroups.com, "mozgmozg23"
> > <mozgmozg23@y...>
> > > wrote:
> > > >
> > > >
> > > > Hi. I've got a problem with my mono\poly- it's completely out
> of
> > > > tune: for example the first "C" note is not like second "C"
> and
> > > > third "C" is more like "D"... So, can anyone tell me how to
> tune
> > it?