Keys, scales, and chords
Set a key and scale for the whole project on the key track (a global lane on the timeline, alongside tempo and time signature), or add key changes at any bar. The piano roll reads the key at the current position and highlights the in-scale notes, so writing in key is visual, not memorized. The chord track shows each chord’s function in the current key as roman numerals.
Scales and scale snap
Thirteen scales are built in, from major and minor through the modes and pentatonics. Scale snap constrains note input to the active key and scale. Notes land where they belong, so the key you set once shapes every note you draw after it. Toggle scale snap off any time for chromatic freedom.
Key changes mid-song
A key change at bar 17 is a region on the key track, placed on the timeline like any other global lane content. Everything that reads the key (piano roll highlighting, scale snap, chord analysis) updates at that position automatically. There’s nothing to re-point or refresh: the current position decides which key applies.
The chord track
The chord track displays chord symbols along the timeline, with roman numeral analysis showing each chord’s function in the current key (I, IV, V, vi), so the harmonic structure of the song is readable at a glance. Chord regions re-analyze automatically when the key changes: the same chord shows its new function in the new key. Roman numerals toggle on or off in project settings.
Seeing MIDI on the timeline
MIDI clips render their instrument’s waveform faintly behind the note blocks on the timeline, so amplitude and timbre are visible without bouncing anything to audio. You can see what a part sounds like, not just which notes it plays.