Build from a root
Choose a root and load a chord quality, or start with an empty selection. Each interval button adds or removes a tone relative to the builder root. A major chord uses 1, 3 and 5; adding 7 makes a major seventh, while adding ♭7 makes a dominant seventh. Changing the builder root transposes the notes you have already chosen.
Add color and tension
Try adding 9 to a major seventh, or ♭9 to a dominant seventh. The buttons group equivalent pitch classes: 9 shares a pitch class with 2, 11 with 4, and 13 with 6. You can combine altered tones freely. The suggested names describe exact note collections in the catalog, so incomplete or unusual sets may have no name, and some sets admit more than one.
Hear a different bass
Choose a selected chord tone as the bass to hear an inversion. For C major, compare C–E–G with E–G–C and G–C–E. The preview lists octave-qualified notes in ascending order and places the other tones above your chosen bass. Choosing a bass rebuilds a close voicing. Imported notes and matched fretboard positions keep their actual octaves until you edit the chord. Use the preview text to see the playback register.
Keep exploring the same chord
Use the links below to explore the piano roll, negative harmony and tritone substitutions. In the app’s Reference panel, these tools share a selection across tabs. Sending a chord to the fretboard changes the Explore selection without editing lesson steps or timeline clips.