If I Should Lose You in B

Ralph Rainger / Leo Robin(1936)swing
Do Re MiC D E
A
B/D♯
F♯13
C♯m/B
B/D♯
F♯13
B/D♯
C♯m11
F♯7sus4

Chord Diagrams — If I Should Lose You in B (Guitar)

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If I Should Lose You in B

Key of B

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 D# to G# (ascending perfect fourth), G# to B (ascending minor third), B to E (ascending perfect fourth), E to F# (ascending whole step), F# to E (descending whole step), E to B (descending perfect fourth), B to C# (ascending whole step), C# to F# (ascending perfect fourth), F# to B (ascending perfect fourth), B to B (ascending unison), B to C# (ascending whole step), C# to C# (ascending unison), C# to C# (ascending unison), C# to A# (descending minor third), A# to E (ascending tritone), E to D (descending whole step), D to G (ascending perfect fourth), G to C# (ascending tritone), C# to F# (ascending perfect fourth), F# to F# (ascending unison). 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 F# to D# by minor third.

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.

swing4/4 · 33 bars · Form: A

Chords: D♯7, G♯m, B7, EMaj7, F♯m7, E6, B/D♯, C♯m9, F♯13, Bdim, B, C♯9, C♯m7, C♯m/B, A♯m7♭5, E, Ddim, Gdim, C♯m11, F♯7sus4, F♯9.

Scales for Improvisation B bebop, B bebop major.

Diatonic chords: See all chords in the key of B