Observed arrival · 2026-11-03
TBOSS gives the TheoryBoard a whole new musical vocabulary
Free, open-source replacement firmware adds scale-based playing, sequencing, and extensive MIDI controls to the TheoryBoard THY333.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- TheoryBoard THY333 owners making music
- Worth noticing
- The web editor includes 12 custom scale slots, while the firmware offers 86 built-in scales.
Field notes
The feature set spans performance and composition: chord hints, chord capture, MIDI clock in and out, sustain-pedal support, and patterns that follow a DAW are all described. The editor also manages progressions and presets; the page says saved presets can retain their own chord-set copies. The project says updates preserve settings, presets, and scales.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
◉HumanPersonal, local, civic, or handmade
One card from the complete issue