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Releases: beatonma/whammy-arduino

1.0

04 May 21:57
@beatonma beatonma
v1.0
81b491b
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1.0 Latest
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  • Added 'active' mode.
  • Usability improvements:
    • Now uses an RGB LED with a different colour for each mode.
    • Sine, sawtooth up/down, triangle modes are now combined into Waves mode and chosen by tapping the modifier button.
    • Disabled some randomiser modes - the code is still there so they can be enabled again if wanted.

I also added a power jack so it can be powered via a normal 9V pedal power supply.

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0.1

04 May 21:15
@beatonma beatonma
v0.1
e819f64
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0.1

First release.

whammy-arduino

A MIDI controller for the Digitech Whammy IV effects pedal.

Demo on Youtube

Pedal externals Pedal guts

The implementation currently provides these modes:

  • Saw up: / / / / / / /
  • Saw down: \ \ \ \ \ \ \
  • Triangle: / \ / \ / \ /
  • Sine: like triangle but curvier.
  • Square: _ - _ - _ - _
  • "Map of the Problematique" sequencer.
  • Randomisers:
    • Quantized to a musical mode e.g. Phrygian, Lydian...
    • Unquantized, any pedal position. Bleep bloop.
    • Unquantized, any pedal position, any patch.
    • Chaos randomiser, applying any of the other modes randomly.

Hardware

  • Arduino Nano clone
  • 3 momentary buttons
  • One linear potentiometer
  • MIDI port
  • LED
  • A few resistors, wire, case, etc.

Controls

On/off: activate the pedal.
Modifier + On/off: Toggle between momentary and latching activation. Default: momentary.

Mode: move to the next pedal mode.
Modifier + Mode: move to previous mode.

Tempo potentiometer: Turn to change speed of all pedal functions.
Modifier + Tempo potentiometer: Limit the maximum range of the pedal position for tasteful vibrato-like operation [citation needed].

Modifier: Tap to change the musical mode used in 'quantized scale' mode.

In all modes, the LED brightness indicates the effective position of the pedal - brighter means toe-down, darker means heel-down.

monitor.pd

If you want to work on this project without going mad from constant
atonal wee-woo noises, open monitor.pd with
Pure Data to see a visualisation of the
MIDI messages instead.

Visualisation with Pure Data

This project kept me busy while isolating with Covid 19 in April 2022. The illness provided some gnarly headaches and this project did not help with that whatsoever. Fun though.

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