Controllers and Editors for Synths, Keyboards and Effects

 FVC - Four Voice Controller for Eurorack Demo Video Here:  FVC-1 User Guide Roland APRO Control Map 5 Different Combinations  FVC-1         Four Voice Controller Keyboard Logic FVC-EG1    ADSR/voice  0-5V output   FVC-EG1+  ADSR/voice  0-10V output FVC-EG2    VCF ADSR/voice + LFO  0-5V output FVC-EG2+  VCF ADSR/voice + LFO 0-10V output    Features   All functions are controlled with CC numbers  so you need a controller keyboard   5 Volt versions are suitable for Behringer Model D, Pro-1, Cat and K2 10 Volt version best for 2-XM but 5V version still a useable range    FVC-1  - Basic Version   Polyphonic control of 4 MIDI channels. Keyboard modes based on the original Oberheim FVS. 2,3 or 4 voice operation. MIDI IN and 2 unbuffered MIDI Outs  (TYPE A MIDI Jacks). Continuous (Round Robin) or Reset. Split. Split Mode = Mono-L Poly-R or Poly-L  Mon...

The Pro Micro  How to get the projects If you are interested in building any of these projects please contact me for details. I don't supply any parts but you can get the Pro Micro and other parts from eBay etc.  You can contact me via the comments sections. Alternatively,  email me at  gmail - my name is chaz riff but without the space ;) Behringer 2-XM Polyphonic Controller This is the latest project - a four voice controller for the Behringer 2-XM. This is based on the Oberheim SEM which was the synth module that was in the famous FVS (Four Voice Synthesiser) from 1978. This project uses 2 Pro Micros connected via the TX and RX pins. I needed 2 because it requires 32 ins and outs.        FVC connected to 2-XMs More info  here Low Cost Polyphonic Keyboard Controller for mono synths A much simpler and cheaper alternative to the 2-XM controller. Very cheap to build and still has an on board polyphonic ADSR. All controls are handled with CCs f...

Behringer 2-XM Polyphonic Controller This is the latest project - a four voice controller for the Behringer 2-XM. The 2-XM is based on the Oberheim SEM which was the synth module that was in the famous FVS (Four Voice Synthesiser) from 1978. I was lucky enough have one of these (courtesy of the record company!) and used it for live and recording until the mid 80s when it died! I still have one of the modules but the rest is long gone. I had given up all hope of ever replacing it until Behringer announced 2-XM which is a faithful but smaller recreation of the modern SEM (2000s). Each 2-XM is actually 2 SEMS  - can you see why it's called the 2-XM ;)  so if you have 2 units and a controller you would have the equivalent of the mighty FVS. More information about ordering and building  here Here is the finished prototype.... FVC connected to 2 x 2-XMs for a four voice system Short demo of the FVC features  2-XM Controller Features Polyphonic control of 2 units for emulat...

MIDI Organ Drawbars   When Guido Scognamiglio (Zioguido, GSi) released the D9U drawbard kit on GM-Lab I ordered the kit and built it. It was my first experience of the programming an Arduino Pro Micro and thanks to his excellent code I was able to modify and improve the unit. I then went on to build many projects based on the Pro Micro. GM-LAB I sold the D9U then picked up a set of old Hammond MIDI drawbars so I was able to build a unit based on Guido's design. One thing I didn't like about the D9U was the tiny micro switch at the back of the unit. This was used to switch between 2 sets of drawbars. I realised that it would be easy to use a rotary switch instead and then change the code to allow the adjustment of 4 sets of drawbars. Th CCs for the drawbars are stored in an array: int CCMap[4][9] = { { 12, 13, 14, 15, 16, 17, 18, 19, 20},  // Upper B { 40, 41, 42, 43, 44, 45, 46, 47, 48 },  //  Upper A { 80, 81, 82, 83, 84, 85, 86, 87, 88 },  // Lower B { 50...

Pitch Bend and Mod for Nord Electro 5/6  -  Why? Well unlike the Stage the Electro has no Pitch and Mod wheels. That isn't a problem because you can just attach another keyboard and use the Ext to Lo feature. But what if you don't have a spare keyboard and even if you have one you are still missing...... Freely assignable split point Vibrato on the Ext to Lo channel - depth controlled with joystick Y axis Simulated Mono Mode Ability to control an external sound module Assignable Electro CC to joystick Y axis (Pitch Bend) Flip switch - Upper > Lower & Lower > Upper Feature list: Joystick X-axis for Pitch Bend +/- 2 semitones Joystick Y +ve axis for Modulation (vibrato) Joystick X axis for CC control of Electro Assignable control of one parameter on the Nord using the Y axis of the stick Assignable control retained in memory Triangle wave LFO with rate control Mono/Poly switch - with last note retrigger in Mono Mode Split switch - freely split Internal/External zones o...