TBOSS
TBOSS is free, open-source firmware for the TheoryBoard THY333. Play chords and melodies by scale degree in any key, with strum, an arpeggiator, progressions, a step sequencer and full MIDI control. It installs from your browser in about a minute.
A community project. TBOSS is not affiliated with, endorsed or supported by the makers of the TheoryBoard. It installs through the board's own update mode and never touches its start-up loader, so you can always reinstall it, or go back to the original firmware (how).
Enjoying TBOSS? It's free, and every update costs nothing. If it has made your TheoryBoard more fun and useful, a donation of any size helps keep this project going and fund future development.
DonateOut of the box it plays like a regular TheoryBoard. Everything extra is off until you turn it on, and the manual walks through each feature with an example.
Pick a root and a mode: the left half plays the key's chords, the right half its scale. Chord names on the display.
The modes of major and minor, pentatonics, blues, bebop, Messiaen's modes and more, plus 12 scales you make in the web editor.
Inversions, a real guitar voicing, spread and octaves; any 12 chords on the pads, or the original's full chord layout.
Strums with a human feel, an arpeggiator with Euclidean rhythms and tuplets, MPC-style note repeat, echo and harmony.
Record a song's chords and let the board play them in time, or build patterns in a four-lane step sequencer that follows your DAW.
Hints light the chords that usually come next, pivot chords lead to a new key, chord capture finds the key you played in.
Poly aftertouch, pitch bend or CCs from pressure, velocity curves, MIDI clock in and out, TRS MIDI out and a sustain pedal.
A USB cable and Chrome or Edge: no drivers, no tools. Updates keep your settings, presets and scales.
Tested on a board (2.0.8). 2.0 also brings 1.9 and 1.8, not released on their own. Four things from the roadmap and two you asked for, then more:
C2/4 P1 …).You need the TheoryBoard, its USB cable, and Chrome or Edge on a computer.
Free, and it stays free. Every feature and every update costs nothing. If TBOSS has made your TheoryBoard more fun, you can help fund future development with a donation of any size. Entirely optional.