The guitar’s most resonant open key.
See how all seven chords sit together, and hear what makes each degree do its job.
Open G Major in the Studio →The key of G Major contains G, Am, Bm, C, D, Em, F#dim. In Roman numerals that's I, ii, iii, IV, V, vi, vii° — the tonic (G) is home, and the dominant (D) creates the tension that resolves back to it.
F♯. It's the seventh degree of the scale — the leading tone that pulls back up to G. That single raised note is the only thing separating G major's notes from C major's, and it's what gives the key its own centre of gravity.