How to practice I Didn't Know About You with play-along tracks?

Use the play-along backing track above to practice I Didn't Know About You in the key of C. Listen to the audio with bass, piano, and drums, start by playing the melody, then practice improvisation and soloing over the chord changes.

What scales to use for soloing over I Didn't Know About You?

For soloing over I Didn't Know About You, recommended scales include: bebop, bebop major. Use arpeggio patterns over each chord to create melodic lines that follow the harmony of this jazz tune.

Who composed I Didn't Know About You?

I Didn't Know About You was composed by Duke Ellington / Bob Russell in 1944. It is a swing standard in 2/2 time. The original key is F; this page shows it transposed to C.

What key is I Didn't Know About You in?

The original key of I Didn't Know About You is F. The form is AB with 27 bars. This page shows the chart transposed to C.

What scales work for improvising over I Didn't Know About You?

Recommended scales for I Didn't Know About You in C: bebop, bebop major. Scales and arpeggios update in real-time as each chord plays, with context-aware analysis (e.g., Phrygian Dominant over secondary dominants).

How does the interactive backing track work?

The backing track plays with realistic walking bass, drum patterns, and voice-led chord voicings. Scales and arpeggios update in real-time as each chord plays. You can limit the fretboard zone for close-proximity voicings, toggle a reference melody, loop any section, and choose between multiple sound presets. Works for guitar, piano, bass, ukulele, and 7 more instruments.

Can I edit the chord chart?

Yes. You can modify the structure, chords, and arrangement of any standard to match your preferred version or create your own reharmonization.

I Didn't Know About You in C

Duke Ellington / Bob Russell(1944)swing

Do Re MiC D E

Section A

♬

CMaj9

♬

G13

♬

A♯9♯11

♬

Section B

G7sus4

♬

C/E

♬

C13

♬

C13♭9

♬

C9♯5

♬

A♯13

♬

D♯69♬

D7♯5

G7♭9♯5

♬

CMaj9

♬

G7sus4

G13♭9

♬

BPM: 120

Chord Diagrams — I Didn't Know About You in C (Guitar)

Display

FingerNoteDegree

Chord Voicings Closest Voicing

CMaj9

G13

A♯9♯11

G7sus4

D♯dim

C/E

Gm9

C13

C13♭9

C9♯5

A♯13

D♯69

D7♯5

G7♭9♯5

G - B - D♯ - F - A♭

G13♭9

I Didn't Know About You in C

Key of C

With no sharps or flats, C major is the theoretical home base on guitar. The open G, B, and high E strings all belong to the C major chord, creating natural sustain. C is a beginner-level key on guitar because the open B and high E strings ring within the scale, and every basic chord uses familiar open shapes. Beginners will find this key approachable since most chords use open voicings with minimal stretching.

Voice Leading

The bass line moves through D to G (ascending perfect fourth), G to C (ascending perfect fourth), C to C (ascending unison), C to F (ascending perfect fourth), F to E (descending half step), E to A# (ascending tritone), A# to A (descending half step), A to D (ascending perfect fourth), D to D (ascending unison), D to D (ascending unison), D to G (ascending perfect fourth), G to E (descending minor third), E to A# (ascending tritone), A# to G (descending minor third), G to D# (descending major third), D# to C (descending minor third), C to G (descending perfect fourth), G to C (ascending perfect fourth), C to C (ascending unison), C to F (ascending perfect fourth), F to C (descending perfect fourth), C to F (ascending perfect fourth), F to F (ascending unison), F to A# (ascending perfect fourth), A# to F (descending perfect fourth), F to A# (ascending perfect fourth), A# to D# (ascending perfect fourth), D# to D (descending half step), D to G (ascending perfect fourth), G to D (descending perfect fourth), D to G (ascending perfect fourth), G to C (ascending perfect fourth). A half-step bass movement creates a strong leading-tone pull that demands resolution. 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 C to D by whole step.

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.

swing2/2 · 27 bars · Form: AB

Chords: Dm9, G7♭9, CMaj9, C6, F7, E7, A♯9, A7♭9, D7♯11, D7, Dm7, G13, Em7, A♯9♯11, G7sus4, D♯dim, C/E, Gm9, C13, C13♭9, FMaj7, C9♯5, F6, Fm7, A♯7, Fm9, A♯13, D♯69, D7♯5, G7♭9♯5, D9, G13♭9, C.

Scales for Improvisation C bebop, C bebop major.

Diatonic chords: See all chords in the key of C