I Didn't Know What Time It Was in B

Richard Rodgers / Lorenz Hart(1939)swing
Do Re MiC D E
A
B
E/B
E/B
EMaj7/B
F♯7/C♯
B/D♯
C♯m7/B
C♯m7/B
G♯m9sus4
A♯m7♭5/E
A♯m7♭5/E
F♯/A♯
BMaj9
G♯m11/C♯
G♯m9sus4
C♯m11
BMaj7/F♯
F♯11

Chord Diagrams — I Didn't Know What Time It Was in B (Guitar)

Display
FingerNoteDegree
B
EADGBE111234
4frEADGBE111xx47frEADGBE1113429frEADGBE11x243
F♯
EADGBE111342
4frEADGBE11x2436frEADGBE1114329frEADGBE111234
E/B
7frEADGBE111234
EADGBE2312frEADGBExx12434frEADGBE111432
EMaj7/B
7frEADGBE111324
EADGBE312EADGBE333xx14frEADGBE111x43
F♯7/C♯
4frEADGBE11x324
EADGBE1111327frEADGBEx3241x9frEADGBE111134
B/D♯
EADGBE111234
4frEADGBE111xx47frEADGBE1113429frEADGBE11x243
D♯7
EADGBExx1324
6frEADGBE111x348frEADGBE111xx211frEADGBE111132
G♯aug
EADGBE11432x
4frEADGBE1x423x5frEADGBE11xx2x9frEADGBE11x32x
G♯7
EADGBE111xx2
4frEADGBE1111326frEADGBE11x32411frEADGBE111134
G7♯11
EADGBE111234
5frEADGBExx12349frEADGBE11x23410frEADGBE111x23
F♯9
EADGBE111324
3frEADGBExx21438frEADGBE22222111frEADGBE1111x2
C♯m7/B
4frEADGBE111x32
5frEADGBExx23149frEADGBE11111411frEADGBExx1423
A♯m7
EADGBE111x32
EADGBExx23146frEADGBE1111138frEADGBE11x423
G♯m9sus4
G♯m
4frEADGBE111134
6frEADGBExx13427frEADGBExx324111frEADGBE111342
C♯
EADGBE11x432
4frEADGBE1112346frEADGBE1113249frEADGBE111342
C♯m
EADGBEx4213x
4frEADGBE1113426frEADGBE1132x49frEADGBE111134
F♯6
EADGBE2x143x
EADGBE11x3244frEADGBE111x349frEADGBE3333x1
EMaj7
EADGBE312
EADGBE333xx14frEADGBE111x437frEADGBE111324
D♯m7
EADGBExx1423
6frEADGBE1111327frEADGBExx231411frEADGBE111114
C♯m7
4frEADGBE111x32
5frEADGBExx23149frEADGBE11111411frEADGBExx1423
F♯m7
EADGBE111113
4frEADGBExx14239frEADGBE11113210frEADGBExx2314
F♯7
EADGBE111132
4frEADGBE11x3247frEADGBEx3241x9frEADGBE111134
C♯m11
EADGBE111x23
7frEADGBE1113429frEADGBE11111411frEADGBE11xx23
B6
EADGBEx312x
EADGBE3333x17frEADGBE1x324x9frEADGBE11xx34
A♯m7♭5/E
EADGBE11xx24
EADGBEx1324x5frEADGBE2x341x8frEADGBE222xx1
F♯/A♯
6frEADGBE111432
EADGBE1113424frEADGBE11x2439frEADGBE111234
BMaj9
G♯m11/C♯
EADGBE111342
4frEADGBE1111146frEADGBE11xx239frEADGBE11x334
C♯7
EADGBEx3241x
4frEADGBE111x346frEADGBE1114329frEADGBE111132
C♯m7♭5
4frEADGBEx1324x
5frEADGBE11xx248frEADGBE2x341x11frEADGBE222xx1
BMaj7/F♯
EADGBE111324
4frEADGBE111xx47frEADGBE1114239frEADGBE11333x
E6
EADGBE2314
EADGBE111345frEADGBEx4231x7frEADGBE3333x1
F♯11
EADGBE3142
4frEADGBE1111237frEADGBE11x3249frEADGBE1111x3
Fm7♭5
EADGBE1x23x
EADGBE222xx18frEADGBEx1324x11frEADGBE2134x

I Didn't Know What Time It Was 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 B to F# (descending perfect fourth), F# to E (descending whole step), E to E (ascending unison), E to F# (ascending whole step), F# to B (ascending perfect fourth), B to D# (ascending major third), D# to G# (ascending perfect fourth), G# to G# (ascending unison), G# to G (descending half step), G to F# (descending half step), F# to C# (descending perfect fourth), C# to A# (descending minor third), A# to G# (descending whole step), G# to G# (ascending unison), G# to C# (ascending perfect fourth), C# to C# (ascending unison), C# to F# (ascending perfect fourth), F# to E (descending whole step), E to D# (descending half step), D# to C# (descending whole step), C# to F# (ascending perfect fourth), F# to F# (ascending unison), F# to C# (descending perfect fourth), C# to B (descending whole step), B to A# (descending half step), A# to F# (descending major third), F# to B (ascending perfect fourth), B to G# (descending minor third), G# to C# (ascending perfect fourth), C# to C# (ascending unison), C# to B (descending whole step), B to E (ascending perfect fourth), E to F# (ascending whole step), F# to F (descending half step). A half-step bass movement creates a strong leading-tone pull that demands resolution. The predominantly stepwise bass motion creates smooth, connected voice leading. When the progression loops, the bass returns from F to B by tritone.

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 · 43 bars · Form: AB

Chords: B, F♯, E/B, EMaj7/B, F♯7/C♯, B/D♯, D♯7, G♯aug, G♯7, G7♯11, F♯9, C♯m7/B, A♯m7, G♯m9sus4, G♯m, C♯, C♯m, F♯6, EMaj7, D♯m7, C♯m7, F♯m7, F♯7, C♯m11, B6, A♯m7♭5/E, F♯/A♯, BMaj9, G♯m11/C♯, C♯7, C♯m7♭5, BMaj7/F♯, E6, F♯11, Fm7♭5.

Scales for Improvisation B bebop, B bebop major.

Diatonic chords: See all chords in the key of B