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 A#. 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 A#.

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 A#.

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

Recommended scales for I Didn't Know About You in A#: 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 A#

Duke Ellington / Bob Russell(1944)swing

Do Re MiC D E

Section A

♬

A♯Maj9

♬

F13

♬

G♯9♯11

♬

Section B

F7sus4

♬

A♯/D

♬

A♯13

♬

A♯13♭9

♬

A♯9♯5

♬

G♯13

♬

C♯69♬

C7♯5

F7♭9♯5

♬

A♯Maj9

♬

F7sus4

F13♭9

♬

BPM: 120

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

Display

FingerNoteDegree

Chord Voicings Closest Voicing

A♯Maj9

F13

G♯9♯11

F7sus4

C♯dim

A♯/D

Fm9

A♯13

A♯13♭9

A♯9♯5

G♯13

C♯69

C7♯5

F7♭9♯5

F - A - C♯ - E♭ - G♭

F13♭9

A♯

I Didn't Know About You in A#

Key of A#

A# (Bb) major requires barre chords rooted at fret 1 on the A string or fret 6 on the E string. Despite the barre demands, it is a common key in funk, New Orleans R&B, and brass band music. The open D string can ring as the major third for added color. A# is a intermediate-level key on guitar because the open D string is the major 3rd of Bb, adding a bright color if allowed to ring. 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 F (ascending perfect fourth), F to A# (ascending perfect fourth), A# to A# (ascending unison), A# to D# (ascending perfect fourth), D# to D (descending half step), D to G# (ascending tritone), G# to G (descending half step), G to C (ascending perfect fourth), C to C (ascending unison), C to C (ascending unison), C to F (ascending perfect fourth), F to D (descending minor third), D to G# (ascending tritone), G# to F (descending minor third), F to C# (descending major third), C# to A# (descending minor third), A# to F (descending perfect fourth), F to A# (ascending perfect fourth), A# to A# (ascending unison), A# to D# (ascending perfect fourth), D# to A# (descending perfect fourth), A# to D# (ascending perfect fourth), D# to D# (ascending unison), D# to G# (ascending perfect fourth), G# to D# (descending perfect fourth), D# to G# (ascending perfect fourth), G# to C# (ascending perfect fourth), C# to C (descending half step), C to F (ascending perfect fourth), F to C (descending perfect fourth), C to F (ascending perfect fourth), F to A# (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 A# to C by whole step.

Scales for Improvisation

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

swing2/2 · 27 bars · Form: AB

Chords: Cm9, F7♭9, A♯Maj9, A♯6, D♯7, D7, G♯9, G7♭9, C7♯11, C7, Cm7, F13, Dm7, G♯9♯11, F7sus4, C♯dim, A♯/D, Fm9, A♯13, A♯13♭9, D♯Maj7, A♯9♯5, D♯6, D♯m7, G♯7, D♯m9, G♯13, C♯69, C7♯5, F7♭9♯5, C9, F13♭9, A♯.

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

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