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?