Published on Dec 8, 2014 jhvanaken
"quick demo of an Arduino-based ribbon controller for the Dave Smith Instruments Evolver
submitted as a term project for MUMT 306 under Gary Scavone, McGill University
details of this project here: http://softpotevolver.wordpress.com/"
"The hardware is based on an Arduino Uno microcontroller, using SoftPot membrane potentiometers as touch sensitive inputs. It will send high time resolution control data over USB to a PC, where a Max/MSP patch which will then receive and convert that data into a variety of MIDI messages.
With only six analog input pins on the Uno board, and no pressure sensitivity on the SoftPots, the controller cannot effectively act as a MIDI keyboard replacement. However, the ability to modulate parameters other than note on/off using MIDI control change and SysEx messages make this an effective interface for live performance and sound design using digital instruments. Ribbon controllers are an intuitive means to change values over a continuous range, and may prove to be more useful than knobs and sliders for some aspects of gestural synthesis control.In addition to a ‘general’ MIDI control Max patch, I will be focusing on developing a patch specific to the Dave Smith Instruments Desktop Evolver synthesizer. The Evolver has a well documented MIDI specification and a large number of parameters available for SysEx control. The fact that this synthesizer also has a inbuilt 4-track sequencer means that it does not rely on an external MIDI keyboard or sequencer to play musical sequences, simplifying the task of generating MIDI control messages immensely. By the end of this project I hope to use this controller to modify the pitch and timbre of looping Evolver sequences on the fly. Time permitting, I also plan to implement some more advanced features into the control of the Evolver’s sequencer such as tap tempo, or multi-finger gestures to trigger new sequences."
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