Play any song —
in every key.
The browser studio for the working pianist and keyboardist. Get any song’s chords and number chart, move it to any key, add richer voicings, lock the groove — and walk into rehearsal ready. One tab, nothing to install.
Multiple engines.
One session.
Not toys, not demos — the engines keyboard players reach for to learn a song, voice it richer, and lock the groove. No years of theory required.
GrooveLock
Live drums and chord beds that lock to your key, voicing, and feel in real time. Press play, keep playing.
Reharmonization Engine
Drop-2 voicings, secondary dominants, tritone substitutions, and altered tensions — generated on tap from any chord or progression.
MIDI Chord Analyzer
Drop in a MIDI file and get every chord named — inversions, extensions, and altered tensions detected instantly in your browser.
Progression Lab
Build a progression on a visual timeline, audition it instantly, then export the whole arrangement as a standard MIDI file for your DAW.
From the song
to the gig.
Hear the song. Chart it in numbers. Voice it richer. Lock the groove. Four steps, same tab, rehearsal-ready.
Hear it
Drop in the song, get every chord named in seconds — right in your browser.
Chart it
Lay the progression on a timeline — with the Nashville numbers, so it works in any key.
Voice it
Add the colour — drop-2 voicings, secondary dominants, passing chords.
Play it
Hit play. Live drums and chord beds lock to your key for rehearsal.
Real songs.
Chords & number charts.
Real songs, every chord, plus the Nashville number chart so you can play them in any key.
Theory, voicings,
& the set list.
Written for working musicians. No filler.
Key Signatures for Piano: Sharps, Flats and Relative Minor
Read sharp and flat key signatures, distinguish relative major and minor, and connect the written key to chords on the piano.
What churches actually look for when hiring a keyboardist
What churches actually look for when hiring a keyboardist is a blend of liturgical sensitivity, technical fluency, and production‑level versatility that ev…
Piano Chord Extensions: 7ths, 9ths, 11ths and 13ths
Read piano chord-extension symbols, compare major and dominant ninths, and choose voicings that support a worship melody.
Stop guessing the chords.
Start playing.
Every tool a keyboard player needs — hear it, chart it, voice it, play it — in one tab. Built for the player who has to be ready by the next rehearsal.