I Didn't Know What Time It Was in C#

Richard Rodgers / Lorenz Hart(1939)swing
Do Re MiC D E
A
B
F♯/C♯
F♯/C♯
F♯Maj7/C♯
G♯7/D♯
C♯/F
D♯m7/C♯
D♯m7/C♯
A♯m9sus4
Cm7♭5/F♯
Cm7♭5/F♯
G♯/C
C♯Maj9
A♯m11/D♯
A♯m9sus4
D♯m11
C♯Maj7/G♯
G♯11

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

Display
FingerNoteDegree
C♯
EADGBE11x432
4frEADGBE1112346frEADGBE1113249frEADGBE111342
G♯
EADGBE11132x
4frEADGBE1113426frEADGBE11x2438frEADGBE111432
F♯/C♯
4frEADGBE11x243
EADGBE1113426frEADGBE1114329frEADGBE111234
F♯Maj7/C♯
4frEADGBE11x333
EADGBE1114236frEADGBE111x439frEADGBE111324
G♯7/D♯
EADGBE111xx2
4frEADGBE1111326frEADGBE11x32411frEADGBE111134
C♯/F
EADGBE11x432
4frEADGBE1112346frEADGBE1113249frEADGBE111342
F7
EADGBE111132
3frEADGBE11x3248frEADGBE11113410frEADGBE111xx2
A♯aug
EADGBEx1423x
3frEADGBE11432x6frEADGBExx42317frEADGBE11xx2x
A♯7
EADGBE111x34
6frEADGBE1111328frEADGBE11x32411frEADGBEx3241x
A7♯11
EADGBEx13
4frEADGBE1112347frEADGBExx123411frEADGBE11x234
G♯9
EADGBE11234x
4frEADGBE1113245frEADGBExx214310frEADGBE222221
D♯m7/C♯
EADGBExx1423
6frEADGBE1111327frEADGBExx231411frEADGBE111114
Cm7
EADGBEx2134x
3frEADGBE1111324frEADGBExx23148frEADGBE111113
A♯m9sus4
A♯m
EADGBE11x342
6frEADGBE1111346frEADGBE111xx38frEADGBExx1342
D♯
EADGBExx1243
3frEADGBE11x4326frEADGBE11x2348frEADGBE111xx4
D♯m
EADGBExx1342
EADGBExx32416frEADGBE11134211frEADGBE111134
G♯6
EADGBE1111x3
3frEADGBE2x143x6frEADGBE111x349frEADGBEx4231x
F♯Maj7
EADGBE111423
4frEADGBE11x3336frEADGBE111x439frEADGBE111324
Fm7
EADGBE111113
3frEADGBExx14238frEADGBE1111329frEADGBExx2314
D♯m7
EADGBExx1423
6frEADGBE1111327frEADGBExx231411frEADGBE111114
G♯m7
4frEADGBE111113
6frEADGBE11x4239frEADGBE11x23x11frEADGBE111132
G♯7
EADGBE111xx2
4frEADGBE1111326frEADGBE11x32411frEADGBE111134
D♯m11
EADGBE11xx34
4frEADGBE11x2349frEADGBE11134211frEADGBE111114
C♯6
EADGBEx4231x
4frEADGBE3333x16frEADGBE1114239frEADGBE11x324
Cm7♭5/F♯
4frEADGBE11xx24
EADGBEx1324x8frEADGBE11123410frEADGBE333xx1
G♯/C
8frEADGBE111432
EADGBE11132x4frEADGBE1113426frEADGBE11x243
C♯Maj9
A♯m11/D♯
4frEADGBE111342
6frEADGBE1111148frEADGBE11xx2311frEADGBE11x234
D♯7
EADGBExx1324
6frEADGBE111x348frEADGBE111xx211frEADGBE111132
D♯m7♭5
EADGBE222xx1
6frEADGBEx1324x7frEADGBE11xx2410frEADGBE2x341x
C♯Maj7/G♯
4frEADGBE111324
EADGBE111x436frEADGBE11xxx39frEADGBE1x342x
F♯6
EADGBE2x143x
EADGBE11x3244frEADGBE111x349frEADGBE3333x1
G♯11
4frEADGBE111112
6frEADGBE1111239frEADGBE11x32411frEADGBE1111x3
Gm7♭5
EADGBE3xx421
EADGBE2x341x5frEADGBE222xx110frEADGBEx1324x

I Didn't Know What Time It Was in C#

Key of C#

C# major (or Db) sits in barre chord territory across the fretboard. Every chord demands precise barring, but the payoff is a bright, crystalline sound a half step above C that cuts through a band mix. C# is a intermediate-advanced-level key on guitar because no open strings fall within the key naturally, so every chord requires full barre technique. Expect to rely on barre chords throughout, which builds hand strength and unlocks the entire fretboard.

Voice Leading

The bass line moves through C# to G# (descending perfect fourth), G# to F# (descending whole step), F# to F# (ascending unison), F# to G# (ascending whole step), G# to C# (ascending perfect fourth), C# to F (ascending major third), F to A# (ascending perfect fourth), A# to A# (ascending unison), A# to A (descending half step), A to G# (descending half step), G# to D# (descending perfect fourth), D# to C (descending minor third), C to A# (descending whole step), A# to A# (ascending unison), A# to D# (ascending perfect fourth), D# to D# (ascending unison), D# to G# (ascending perfect fourth), G# to F# (descending whole step), F# to F (descending half step), F to D# (descending whole step), D# to G# (ascending perfect fourth), G# to G# (ascending unison), G# to D# (descending perfect fourth), D# to C# (descending whole step), C# to C (descending half step), C to G# (descending major third), G# to C# (ascending perfect fourth), C# to A# (descending minor third), A# to D# (ascending perfect fourth), D# to D# (ascending unison), D# to C# (descending whole step), C# to F# (ascending perfect fourth), F# to G# (ascending whole step), G# to G (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 G to C# by tritone.

Scales for Improvisation

C# 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, C# Mixolydian adds the flat seventh for an authentic blues-rock edge.

swing4/4 · 43 bars · Form: AB

Chords: C♯, G♯, F♯/C♯, F♯Maj7/C♯, G♯7/D♯, C♯/F, F7, A♯aug, A♯7, A7♯11, G♯9, D♯m7/C♯, Cm7, A♯m9sus4, A♯m, D♯, D♯m, G♯6, F♯Maj7, Fm7, D♯m7, G♯m7, G♯7, D♯m11, C♯6, Cm7♭5/F♯, G♯/C, C♯Maj9, A♯m11/D♯, D♯7, D♯m7♭5, C♯Maj7/G♯, F♯6, G♯11, Gm7♭5.

Scales for Improvisation C# bebop, C# bebop major.

Diatonic chords: See all chords in the key of C#