HiRes is an upgrade for the ModyPoly which adds high pitch resolution, microtuning and portamento. It works for Polysix and Mono/Poly
Category Archives: Mods
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Korg Minipops-120 Single Output Modification
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Here you will find information on how to add single outputs to your beloved Minipops-120.
This mod is compatible to midi added with the uniPulse. An uniPulse installation manual for Korg Minipops 120 is here.
Attached is a picture (extracted from the service manual) of the circuitboard and the points/parts you have to desolder to add single outputs. The HighHats and Cymbal share the same output, so you will get 7 single outputs for Bassdrum, Snaredrum, Claves, High Conga, Low Conga, Bongo and Highat/Cymbal.
ModyPoly for Poly-61M
This is a quick manual how to install the ModyPoly in an Korg Poly-61M. The existing midi sockets are used, so no new holes have to be drilled. Incomming midi messages are passed to both the original midi implementation and the ModyPoly. Outgoing midi messages will be from ModyPoly only.
Polysex now open source hardware
Tubbutec Polysex is discontinued but we decided to make all the design files available to the public as open hardware. You can still purchase the PCBs in our shop.
The files include front panel mechanical drawings and print data, schematics and PCB layout, the mechanical stencil design and manuals.
If you use or modify this, please be so kind and leave a comment below. We also like pictures and videos 🙂
You can download the files as .ZIP here: Tubbutec Polysex design files.
Files are licensed under the CERN OHL v. 1.2.
Juno-66 update – now features custom scales
Juno-66 firmware version 1.24 is released. Apart from the seven built in scales, is now possible to upload a four custom scales using a program like Scala. Of course micro tuning is supported and you can have any number of notes per octave. Have a look at the user manual (chapter 10) for details.
In case you missed previous firmware updates, here are a few of the new features since the initial 1.00 release:
- New school chord memory modes
- Optional auto portamento in MONO B mode
- Three voice mode
- Looping mode, delay and polarity for ADSR
More infos about the Juno-66 upgrade on the Juno-66 product page.
SH-101 noise reduction mod
The Roland SH-101 while an awesome sounding synthesizer, unfortunately suffers from digital noise on its output. The main source of this noise is the current flowing through its DAC combined with bad grounding. The Tubbutec SH-1oh1 mod reduces the noise floor below that of the original (amongst a lot of other features), but noise is sometimes still an issue especially with bass sounds.
This is the instruction of an easy to perform – and reversible – modification that reduces the noise substantially, by about 10dB.
Juno-6 becomes a Juno-66: pictures
Michael Kukat did an amazing job servicing a Juno-6 and installing the Juno-66 mod. With the flawless soldering and carefully placed components the pictures get an aesthetic touch. These are worth a look at – even if you don’t plan to install the Juno-66.
More pictures after the break;
ModyPoly for Mono/Poly demo video
Poly-61 CV injection points
These are some CV injection points of the Poly-61. You need to connect the CV with an additional resistor. Try 100k.Decrease the value for a stronger effect and increase it for a weaker influence.
If you connect one side of the potentiometer to +15V and the other one to -15 you can adjust the value up and down with the center position as default. In this case use the following resistor values:
Cutoff: 100k
Res: 330kAttack: 330k
Decay: 330k
Sustain: 220k
Release: 220k
MG speed: 220k
These give you about the same range as the original controls.
In case you are using the CV outtputs of the ModyPoly, connect a 100nF capacitor across the negative input and the output of the opamp to filter out high frequencies.
This is not tested but I am pretty sure it is working.
[edit: Cutoff, resonance, attack and decay work very well. Very complicated to add control to the other parameters]