Ublucord

The seven keys always play chords that belong to the key and scale you pick here, so everything you play fits together. Push the joystick to change the shape of the next chord.

The arpeggiator plays the held chord one note at a time in time with the BPM. Stab plays the whole chord in rhythm.

Turn on the MIDI switch, then play your controller. MIDI works in Chrome, Edge and Firefox on a computer, and Chrome on Android, when Ublucord runs as its own web page. Safari, iPhone and the claude.ai page do not allow MIDI.

White keys C to B

Chords I to vii in the chosen key, in every octave. Notes mode plays single notes instead.

Black keys

Hold to change the shape: C♯ 7th · D♯ add9 · F♯ sus4 · G♯ sus2 · A♯ 9th

Joystick

Right flips major and minor · left gives dom 7 · up gives 7th · diagonals give add9 and 9th

Pads

Kick, snare, clap and hi-hats

Knobs K1–K8 (CC 70–77)

Tone · Resonance · Filter sweep · Attack · Release · Reverb · Echo · Volume

Sustain pedal

Holds notes in Notes mode

Start and stop

Follows MIDI start and stop from your music software

Press Record loop. Recording starts on the next bar after a one-bar count. When the loop length is filled it starts playing back. Press the button again to overdub another layer on top.