26 Reply by Squadra Smackos (edited by Squadra Smackos 2008-09-08 10:55:46)

  • Registered: 2008-07-08
  • Posts: 1,708

Re: Cheap and simple MIDI retrofits...too goood to be true?

inkinen wrote:
Honey Peters wrote:

any simple ways to midify the juno 6?

i think only kenton does midi retrofits for the juno6, but i might be wrong. would be great to have, or cv/gate in, but i guess thats impossible due to it having dco's.

That isn't the case perse, lots of DCO's are just analog oscies in the end that are controlled digitally...in the Juno 6 its probably even a digital circuit just keeping the CV/GATE in order or something like that...

expand your total self

Squadra Smackos's Website

  • From: ragnaricii
  • Registered: 2008-07-07
  • Posts: 90

Re: Cheap and simple MIDI retrofits...too goood to be true?

Squadra Smackos wrote:
inkinen wrote:
Honey Peters wrote:

any simple ways to midify the juno 6?

i think only kenton does midi retrofits for the juno6, but i might be wrong. would be great to have, or cv/gate in, but i guess thats impossible due to it having dco's.

That isn't the case perse, lots of DCO's are just analog oscies in the end that are controlled digitally...in the Juno 6 its probably even a digital circuit just keeping the CV/GATE in order or something like that...

i guess it depends on how you do/define dco.. is it a vco which is controlled by a digitally generated cv? if so, then it should be no problem to add cv in.

another way of doing dco is using a master clock (for exampel in the korg poly800 at 5 mhz i think?) that is divided (with binary counters) into the lower/right frequencies. thats why its not possible or trivial to do detuning for example.. tuning of ALL oscs is possible because you can always change the master frequency..

perhaps a better term for this type of dco is nco.. http://en.wikipedia.org/wiki/Numericall … oscillator

  • From: hackney grid
  • Registered: 2008-07-09
  • Posts: 328

Re: Cheap and simple MIDI retrofits...too goood to be true?

Installed the Polysix midi mod  smile

Only one issue to report:
The MIDI board pin connector is not quite the right size and therefore remains a bit loose, causing groups of keys not to play.
Pushing the board down and  slightly bending the pins creating more grip solved the issue, now it's working great.
For what I can say so far it works quite well, although it doesn't seem to be quite tight, timing wise. I will test more thoroughly and report....

signalsum

cimabot's Website

  • From: ragnaricii
  • Registered: 2008-07-07
  • Posts: 90

Re: Cheap and simple MIDI retrofits...too goood to be true?

found this for the juno6 (also works with Roland 60, SH-101, MC-202, Jupiter 4/6/8, Yamaha SK series, Oberheim OB series, Korg Polysix or 61, Sequential Prophet series) : http://mungo.com.au/midiretrofits.html

you have to build it yourself so the price will be a little higher than $50AUD

30 Reply by teknob (edited by teknob 2009-01-15 21:23:46)

  • From: Frank fruits
  • Registered: 2008-07-08
  • Posts: 351

Re: Cheap and simple MIDI retrofits...too goood to be true?

inkinen wrote:

found this for the juno6 (also works with Roland 60, SH-101, MC-202, Jupiter 4/6/8, Yamaha SK series, Oberheim OB series, Korg Polysix or 61, Sequential Prophet series) : http://mungo.com.au/midiretrofits.html

you have to build it yourself so the price will be a little higher than $50AUD

I have had one of the prototypes put in a Juno6 by mungo back in 2002, i think it was the 2nd or 3rd. It was great, untill it died two years ago, which i expected, as it was partly made of tape. He then sent me the finished version, with a nice PCB and all, but it still needs a bit more debuging. If I get it working i will let you know

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  • Registered: 2008-07-08
  • Posts: 172

Re: Cheap and simple MIDI retrofits...too goood to be true?

very tempted also to get one for my mono-poly....

Does not seem too difficult either.

  • Registered: 2008-08-06
  • Posts: 318

Re: Cheap and simple MIDI retrofits...too goood to be true?

@ rsprats, wouldn't this be better? http://www.chd-el.cz/index.php?id=409

  • ramos
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Re: Cheap and simple MIDI retrofits...too goood to be true?

hmmm I'm very tempted to midify my juno-6, but might be easier just to get a 60 and a dcb midi convertor...

  • From: ragnaricii
  • Registered: 2008-07-07
  • Posts: 90

Re: Cheap and simple MIDI retrofits...too goood to be true?

teknob wrote:
inkinen wrote:

found this for the juno6 (also works with Roland 60, SH-101, MC-202, Jupiter 4/6/8, Yamaha SK series, Oberheim OB series, Korg Polysix or 61, Sequential Prophet series) : http://mungo.com.au/midiretrofits.html

you have to build it yourself so the price will be a little higher than $50AUD

I have had one of the prototypes put in a Juno6 by mungo back in 2002, i think it was the 2nd or 3rd. It was great, untill it died two years ago, which i expected, as it was partly made of tape. He then sent me the finished version, with a nice PCB and all, but it still needs a bit more debuging. If I get it working i will let you know

i just installed it in a j6 and it works just fine. it responds to note on/note off, and it also generates a arp clock in 8th/16th to incoming midi clock.

  • Registered: 2010-01-04
  • Posts: 48

Re: Cheap and simple MIDI retrofits...too goood to be true?

No, definitely not too good to be true. I finally midi-retrofitted my Yamaha CS-01 and am extremely happy with it, best 40 buck$ i've spent in a long time
I used these guys stuff: http://highlyliquid.com/

ClubMdM's Website

  • Registered: 2010-01-04
  • Posts: 48

Re: Cheap and simple MIDI retrofits...too goood to be true?

Forax wrote:

Here is a neat little Jupiter-4 calibration tip for you: the manual says to turn a trimpot on each voice board to calibrate the pulse width of the square wave so that with the waveform selector on pulse (with a manual value of 1) you have a perfect hollow square wave.

I calibrate mine to be not be truly square so that when apply PWM the wave gets more narrow almost to the point of disappearing.  This gives you a much stronger sounding PWM effect and you can still get the true square wave from the waveform selector switch.  The down side is the manual pulse setting of 4 is inaudible but its worth it to me as I always thought the PWM was a little weak compared to something like the Korg Mono/Poly.

That's very interesting. I calibrated the vcf settings on my Juno-106 alternatively and it sounds a little different to my ears now. I'll have another go at it to get it as sweet as possible. It's one of the craziest things i've had to do though; finetuning really high notes for a long time. If you breath on them trimpots they will jump in pitch. Sometimes feels like you're in an asylum, but i'm getting interested in this kind of thing, i think it can be worth it

ClubMdM's Website

  • From: Frank fruits
  • Registered: 2008-07-08
  • Posts: 351

Re: Cheap and simple MIDI retrofits...too goood to be true?

inkinen wrote:

i just installed it in a j6 and it works just fine. it responds to note on/note off, and it also generates a arp clock in 8th/16th to incoming midi clock.

are you finding the midi clocked arp is a little late? Mine was, so I stayed with 707 triggers.
But it is good news that your midi notes work. I should fish my broken one out again and try and fix it.

teknob's Website

  • From: ragnaricii
  • Registered: 2008-07-07
  • Posts: 90

Re: Cheap and simple MIDI retrofits...too goood to be true?

teknob wrote:
inkinen wrote:

i just installed it in a j6 and it works just fine. it responds to note on/note off, and it also generates a arp clock in 8th/16th to incoming midi clock.

are you finding the midi clocked arp is a little late? Mine was, so I stayed with 707 triggers.
But it is good news that your midi notes work. I should fish my broken one out again and try and fix it.

yeah it seems to be pretty much in time. did you try triggering different machines, because some will only trigger on positive or negative flank..?

  • rude66
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Re: Cheap and simple MIDI retrofits...too goood to be true?

yeah, my mono/poly does that too sometimes. does the j6 have a polarity switch?

40 Reply by inkinen (edited by inkinen 2010-02-20 12:05:19)

  • From: ragnaricii
  • Registered: 2008-07-07
  • Posts: 90

Re: Cheap and simple MIDI retrofits...too goood to be true?

a nice guide for installing the mungo midi retrofit : http://www.andrewmartens.com/blog/?p=60

  • From: Frank fruits
  • Registered: 2008-07-08
  • Posts: 351

Re: Cheap and simple MIDI retrofits...too goood to be true?

hey that's really good. I think I got stuck at "Snag 3" because I never heard the midi notes. Will do what Andrew describes.

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  • rude66
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Re: Cheap and simple MIDI retrofits...too goood to be true?

that highly liquid thing might be the solution for both the korg 800dv and the crumar ds2.. thanks!

  • Registered: 2010-01-04
  • Posts: 48

Re: Cheap and simple MIDI retrofits...too goood to be true?

Cool! I hope companies like that (and like Technology Transplant etc.) will stay around for a long time

ClubMdM's Website

  • Registered: 2008-07-07
  • Posts: 239

Re: Cheap and simple MIDI retrofits...too goood to be true?

i just installed the midikit on my polysix. The note on/off works perfectly, but when trying to sync the arp tempo from my mpc1000 nothing happends. i'm 99.9% sure i installed it correctly. Can it be something to do with the mpc is not sending the right midi clock information? also shouldn't the tempo knob on the polysix arpeggiator be bypassed when midi is connected?

Dancin' for freaks and fame!
  • From: hackney grid
  • Registered: 2008-07-09
  • Posts: 328

Re: Cheap and simple MIDI retrofits...too goood to be true?

bought the tr-808 midi kit from this guy http://www.chd-el.cz/

bought a midi kit for the polysix years ago and had no problems... this time I have made a payment and the guy said it would be shipped within 5 days from payment received but I haven't heard from him in 2 weeks, other than getting an email from PayPal straight away saying the payment was accepted, and he's not responding to emails enquiring if the kit has been shipped or not... has anybody else had trouble with the guy?

signalsum

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  • From: CPH S
  • Registered: 2008-07-14
  • Posts: 635

Re: Cheap and simple MIDI retrofits...too goood to be true?

http://midipolis.blogspot.com/

Home is where your hardware is!!!
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  • beem
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  • Registered: 2008-07-07
  • Posts: 15,327

Re: Cheap and simple MIDI retrofits...too goood to be true?

cimabot wrote:

bought the tr-808 midi kit from this guy http://www.chd-el.cz/

bought a midi kit for the polysix years ago and had no problems... this time I have made a payment and the guy said it would be shipped within 5 days from payment received but I haven't heard from him in 2 weeks, other than getting an email from PayPal straight away saying the payment was accepted, and he's not responding to emails enquiring if the kit has been shipped or not... has anybody else had trouble with the guy?

I dont like the sound of that, i really want that M/P kit

CRACKED BY MR. Z...

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  • From: the stentecnology hideout
  • Registered: 2008-07-07
  • Posts: 2,302

Re: Cheap and simple MIDI retrofits...too goood to be true?

I had good experience with http://www.chd-el.cz/

https://soundcloud.com/stentec

S.T.E.N.T.E.C.'s Website

  • From: CPH S
  • Registered: 2008-07-14
  • Posts: 635

Re: Cheap and simple MIDI retrofits...too goood to be true?

Erroraudio wrote:

http://midipolis.blogspot.com/

This guy should be better for Junos and Jup4s....

Home is where your hardware is!!!
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  • Registered: 2008-08-06
  • Posts: 318

Re: Cheap and simple MIDI retrofits...too goood to be true?

The midipolis features are pretty insane, especially for the price. Full midi contol over everything. Page 2 controls. Extra LFO's. Amazing really.