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Roland GO:KEYS 3 / 5 MIDI Controller Build Plans

USD $22.42

MISSION STATEMENT: Convert an inexpensive but great-sounding keyboard to a
full-featured performance synth!

 

Roland Go:Keys 3 / 5 synth is an inexpensive portable keyboard featuring Roland’s latest Zen-Core sound engine, making it a hidden treasure. The sound quality is literally the same as their top-of-the-line Fantom 0 series synths. The sounds are fully compatible and interchangeable between the Fantoms, Zenology software synth and Go:Keys.

 

1154 factory sounds + 256 user voice slots for industry-leading sounds would make this an amazing value for a performing musician, but to save cost and differentiate Go:Keys line from a professional line of synths, Roland has stripped most crucial controls from the new model. Most importantly, it lacks a Mod wheel or joystick control that is critical for any synth sound performance. As it also lacks aftertouch, there is simply no way to trigger a vibrato or filter without an external controller. Same for expression control. The synth also lacks Filter Resonance and CutOff controls that are equally important, and control of the Rotary Speaker Slow/Fast switch, which is critical for any Drawbar Organ performances in Blues, Rock and other music. Envelope controls, such as Attack, Decay and Release,  are also missing, along with many other functions.

 

My controller converts the crippled keyboard to a full-featured performance synthesizer. It attaches to the optional note stand screw holes for a secure fit, creating a unique vintage-inspired analog look and providing a plethora of sound-shaping controls together with visual guidance such as MIDI controller name and values, envelope and filter shape graphs, etc. The controller plugs into a USB port on the back of the keyboard, using it for an undocumented MIDI functionality and power delivery, and into an expression pedal jack. The dedicated USB-C MIDI port is left free and is available for use with a PC or laptop if needed.

 

FEATURES

  • 96” OLED Display
  • Analog Thumb Joystick for Pitch Bend (X), Vibrato (Y+) and Expression (Y-)
  • 8 Analog Potentiometers for sound control
  • Filter CutOff and Resonance (with graphical feedback)
  • Attack, Decay, Release, Chorus, Reverb (on Page 1)
  • Rotary Speed, Portamento Speed, Vibrato Rate / Depth / Delay (on Page 2)
  • Slider Potentiometer for Rotary Speed Switch / Expression control (with adjustable minimum value)
  • Page flipping encoder
  • Mono/Poly (Page 1) and Portamento (Page 2) switch encoder
  • Detachable Phone/Tablet Note Stand

 

WHAT’S INCLUDED

  • Build Guide PDF
  • Arduino Sketch with documented code
  • Full Schematics / Wiring Diagram
  • Electronics Part List (Bill of Materials) cost, prices, links and photos: total cost of parts is ~$37
  • 3D Models (Blender) for easy modification
  • Ready to print 3D Models (STL)
  • 14 build process photos, documenting the project
  • Reference materials
IMPORTANT NOTE: This is an experimental project. The guide and the files contained in the package are not guaranteed to work; your results may vary. The purchase does not include any form of technical support. Making modifications and adjustments may be required for your project to function properly. The plans do not include any physical items and are sold only in electronic format as downloadable files.

This guide outlines an experimental build that involves 3D printing, soldering, mechanical assembly, code compilation and voltages capable of destroying electronic equipment. Proceed at your own risk. I am not responsible for any damage you may cause to yourself, others, or your synth, computer and other equipment. The information provided is for educational and informational purposes only.

 

Your safety is your responsibility!

Description

Roland GO:KEYS 3 / 5 MIDI Controller Build Plans

Convert an inexpensive but great-sounding keyboard to a full-featured performance synth!
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