MC-2oh2 firmware 1.1 news

Firmware 1.1 is a major update for our MC-2oh2 mod for Roland MC-202 synthesizers.

In addition to the already rich feature set, the update brings a live recorder with overdub, per-step probability, a swing/shuffle function and various small improvements.

Recording

MC-2oh2’s new recording feature can record from the keyboard or the output of the arp. An optional overdub feature allows corrections and ever-evolving patterns. At any time of the recording process, it is possible to switch into the pattern editor and modify the recorded pattern. Afterwards you can continue with the recording without having to stop the sequencer. This is perfect for playing and composing live and a lot of fun!

Per step probability

MC-2oh2 now features probability control of the gate and modifiers (accent, filter accent, portamento and noise) of each note. There are four different levels you can set:

0% (always off)
Low (33% probability by default)
High (66% by default)
100% (always on)

The levels for “low” and “high” can be set globally and even changed via midi CC.
When playing a pattern, the probability will be taken into account: If a note accent has a probability of 33%, every third time this note is played, it will trigger accent.

Swing

MC-2oh2 now features a swing / shuffle setting. Swing will delay every 2nd 16th note by an adjustable amount between 0% and 99%. Swing can be applied with any type of clock source: Internal clock, DIN-Sync, Midi Clock and trigger.

Performance shortcuts

Two new shortcuts are implemented to further improve MC-2oh2s live performance capabilities:
Pressing TEMPO now also shows an overlay with the state of each channel (normal, playing, arpeggiator, recording). With the press of a button you can quickly toggle between a started and stopped state for each channel. This allows quick and easy arrangements. Starting will always happen in sync.

Another shortcut helps to quickly change the channel: Press and hold CHAN and use the DOWN, NORM and UP buttons to select channel 1, 2 or the drum channel.

Screensaver

The new screensaver helps preventing burn-in of the OLED display. We recommend to activate it.

More

There are many more minor improvements and fixes.

Improving Juno-6 and Juno-60 noise

Here are some investigations and improvements on the Juno-6 and Juno-60 noise performance. We looked at both, the original CPU as well as our Juno-66 upgrade

Both, the original CPU and Juno-66 create noise on the output. You can hear that by not playing anything on the keyboard, select SAW as input waveform (as this seems to reduce the VCA bleeding) and pull the gain all the way up.
The noise performance can be improved by adding additional filtering to the 5V supply. In case of the SH-101 for example which has a similar problem, an additional 10µF ceramic cap close to the CPU worked very well.

Now, at least in the case of my Juno, the original CPU has actually a much louder noise ( I assume because it draws more current), as compared to Juno-66.
However, the noise is not focused on one frequency, but a broader spectrum. This is due to jitter in the original CPU processing.

Juno-66 on the other hand, produces noise with a dominant frequency content and hence might be more audible – even though actually quieter.

To rectify this, I have created a firmware update that introduces additional jitter to broaden the spectrum a bit. Note, however that a good solution would of course eliminate the noise via supply rail filtering.

Noise of the original CPU, while a key is pressed the frequency is a bit different.

With the same settings: Juno-66 firmware 1.29. I press keys and change the portamento switch. Note, that this is already quieter than the original CPU

Same setting: Juno-66 firmware 1.3 – jitter is introduced

Soldering an additional 10uF capacitor between GND and 5V on the bottom of the board across the CPU supply pins, improved the noise even further.

You can find the 1.30 firmware on the updater site.

Midi for Kawai SX-210 with OrganDonor

Overview

The Kawai SX-210 version of OrganDonor offers the following features:

  • Fully polyphonic midi input for all 61 Notes
  • Optional learn button to set midi channel.

Installation

The installation is relatively simple, but does require basic soldering skills. You will need to drill a hole for the midi socket.
Installation instructions can be found in this PDF.

User guide

Setting midi channel and keyboard offset

If the optional learn button is installed, it can be used to quickly change the midi receive channel of organDonor.

Connect midi out of a computer or keyboard to midi in of organDonor. Make sure not to send any notes.
Press the learn button and while it is pressed send a midi note on any midi channel. organDonor will set this note as the lowest note of the synthesizer and use its midi channel. These settings are saved.

Playing notes

Send midi notes on the configured midi channel (see above)

More configuration

Alternatively you may configure a lot of parameters using our organDonor configurator.
We recommend using the Kawai SX-210 config file as starting point
1.) Save the file on your hard drive via right click -> save as
2.) in the configurator press “Load configuration” and select the file

Korg Mini Pops 45 MIDI with uniPulse

This manual shows how to install uniPulse in a Korg Mini Pops 45 and trigger all 10 instruments via Midi.

The installation is fairly simple and only requires soldering a few wires and parts into place, as well as drilling a hole for the midi socket.

Trigger connections

Here we see the 10 trigger points for the various instruments. These are trigger outputs P1-P10 from uniPulse directly soldered to the trigger points.

In order to power the uniPulse you just need to solder the brown (V+) and red (GND) wires to the electrolytic capacitor shown in the picture.

Installing the midi socket

Installing the midi socket is simple. A drill guide is included in the kit. Any location is fine, we chose to install the socket next to the audio sockets.

Config file upload

After installing uniPulse, turn on the machine and make sure the LED on the uniPulse is turned on. This means it has power and is running.
Connect midi and use the config tool to upload the following configuration.

Config file (right click, save as)

have fun!

 

Midi for Moog Opus 3 – OrganDonor

Overview

The Opus 3 version of organDonor offers the following features:

  • Fully polyphonic midi input for all notes
  • Optional learn button to set midi channel.

Installation

The installation is relatively simple, but does require basic soldering skills. You will need to drill a hole for the midi socket.
Installation instructions can be found in this PDF.

User guide

Setting midi channel and keyboard offset

If the optional learn button is installed, it can be used to quickly change the midi receive channel of organDonor.

Connect midi out of a computer or keyboard to midi in of organDonor. Make sure not to send any notes.
Press the learn button and while it is pressed send a midi note on any midi channel. organDonor will set this note as the lowest note of the synthesizer and use its midi channel. These settings are saved.

Playing notes

Send midi notes on the configured midi channel (see above)

More configuration

Alternatively you may configure a lot of parameters using our organDonor configurator.
We recommend using the Moog Opus 3 config file as starting point
1.) Save the file on your hard drive via right click -> save as
2.) in the configurator press “Load configuration” and select the file

How to install MIDI jacks the proper way

Introduction

When retrofitting midi to old gear using our kits, often holes for the midi sockets need to be drilled. This guide is how we do it and shows a clean, easy way using a hole punch.

Stuff you need:

  • Drill Aid
  • Center Punch
  • 2mm drill
  • 3.2mm drill
  • 4mm drill
  • 6mm drill
  • 8mm drill
  • Screw hole-punch 15.2mm
  • Box wrench 13mm
  • Electric drill

 

  1. Attach drill aid
  2. Punch the center holes

3. Remove drill aid

4. Drill 2mm pilot holes

5. Use 3.2mm drill

6. Use 4mm drill

7. Use 6mm drill

8. Use 8mm drill

9. Insert screw and skirt of the screw hole-punch

10.Attach the cutting part of the screw hole-punch

11.Use the box wrench, clockwise

12. Result

13. Install MIDI jack

That’s all. Have fun.

 

Midi for Siel Orchestra

Overview

The Siel Orchestra version of OrganDonor offers the following features:

  • Fully polyphonic midi input for all 49 notes
  • Optional learn button to set midi channel.

Installation

The installation is relatively simple, but does require basic soldering skills. You will need to drill a hole for the midi socket.
Installation instructions can be found in this PDF.

User guide

Setting midi channel and keyboard offset

If the optional learn button is installed, it can be used to quickly change the midi receive channel of organDonor.

Connect midi out of a computer or keyboard to midi in of organDonor. Make sure not to send any notes.
Press the learn button and while it is pressed send a midi note on any midi channel. organDonor will set this note as the lowest note of the synthesizer and use its midi channel. These settings are saved.

Playing notes

Send midi notes on the configured midi channel (see above)
By default, the channel is midi channel 1

More configuration

Alternatively you may configure a lot of parameters using our organDonor configurator.
We recommend using the Siel Orchestra config file as starting point
1.) Save the file on your hard drive via right click -> save as
2.) in the configurator press “Load configuration” and select the file

Midi for Korg Lambda using organDonor

Overview

The Korg Lambda version of OrganDonor offers the following features:

  • Fully polyphonic midi input for all 48 notes
  • Optional learn button to set midi channel.

Installation

The installation is relatively simple, but does require basic soldering skills. You will need to drill a hole for the midi socket.
Installation instructions can be found in this PDF.

User guide

Setting midi channel and keyboard offset

If the optional learn button is installed, it can be used to quickly change the midi receive channel of organDonor.

Connect midi out of a computer or keyboard to midi in of organDonor. Make sure not to send any notes.
Press the learn button and while it is pressed send a midi note on any midi channel. organDonor will set this note as the lowest note of the synthesizer and use its midi channel. These settings are saved.

Playing notes

Send midi notes on the configured midi channel (see above)
By default, this is midi channel 1.

More configuration

Alternatively you may configure a lot of parameters using our organDonor configurator.
We recommend using the Korg Lambda config file as starting point
1.) Save the file on your hard drive via right click -> save as
2.) in the configurator press “Load configuration” and select the file

Midi for Roland RS-505 with organDonor

Overview

The Roland RS-505 version of OrganDonor offers the following features:

  • Fully polyphonic midi input for all 49 synthesizer notes and 24 bass notes
  • Bass section on a separate midi channel
  • Optionally control the register switches of the synthesizer section
  • Optional learn button to set midi channel.

Installation

The installation is relatively simple, but does require basic soldering skills. You will need to drill a hole for the midi socket.
Installation instructions can be found in this PDF.

User guide

Setting midi channel and keyboard offset

If the optional learn button is installed, it can be used to quickly change the midi receive channel of organDonor.

Connect midi out of a computer or keyboard to midi in of organDonor. Make sure not to send any notes.
Press the learn button and while it is pressed send a midi note on any midi channel. organDonor will set this note as the lowest note of the synthesizer and use its midi channel. These settings are saved.

Playing notes

Send midi notes on the configured midi channel (see above)
By default, the synthesizer section is on midi channel 1, the bass section on channel 2.

More configuration

Alternatively you may configure a lot of parameters using our organDonor configurator.
We recommend using the Roland RS-505 config file as starting point
1.) Save the file on your hard drive via right click -> save as
2.) in the configurator press “Load configuration” and select the file