Tune Up in Si

Tune Up in Si

Miles Davis's etude-like composition strings together three consecutive ii-V-I sequences descending by whole steps, making it a definitive workout for Bebop Major, Dorian, and Mixolydian in three different key centers in quick succession. The logical harmonic structure makes it an ideal teaching piece, but musical phrasing across the key shifts separates good players from great ones. The bridge offers a moment of tonal stability before the sequence repeats.

Tune Up in Si

B major mixes barre and open elements. The B chord itself is a barre at fret 2, but E and A are comfortable open chords forming the IV and V. The open B string rings as the root, allowing creative drone-based arrangements. B is a intermediate-level key on guitar because the open B string rings as the root and the open E strings provide the 4th — useful for sus4 voicings and drone effects. This key mixes open and barre shapes, making it a good intermediate challenge that builds fretboard fluency.

Voice Leading

The bass line moves through C# to F# (ascending perfect fourth), F# to B (ascending perfect fourth), B to B (ascending unison), B to E (ascending perfect fourth), E to A (ascending perfect fourth), A to A (ascending unison), A to D (ascending perfect fourth), D to G (ascending perfect fourth), G to B (ascending major third). The root motion by larger intervals (fourths and fifths) gives each chord change a strong, decisive character. When the progression loops, the bass returns from B to C# by whole step.

Scales for Improvisation

B major pentatonic works because every note is either a chord tone or a safe passing tone — there are no avoid notes. For soloing, this means you can play freely without clashing. Over dominant seventh chords, B Mixolydian adds the flat seventh for an authentic blues-rock edge.