How to practice Don't Know Why with play-along tracks?

Use the play-along backing track above to practice Don't Know Why in the key of E. 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 Don't Know Why?

For soloing over Don't Know Why, 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 Don't Know Why?

Don't Know Why was composed by Jesse Harris in 1999. It is a swing standard in 4/4 time. The original key is Bb; this page shows it transposed to E.

What key is Don't Know Why in?

The original key of Don't Know Why is Bb. The form is AB with 32 bars. This page shows the chart transposed to E.

What scales work for improvising over Don't Know Why?

Recommended scales for Don't Know Why in E: 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.

Don't Know Why in E

Jesse Harris(1999)swing

Do Re MiC D E

BPM: 120

Chord Diagrams — Don't Know Why in E (Guitar)

Display

FingerNoteDegree

Chord Voicings Closest Voicing

B7/A

B/F♯

E/G♯

Don't Know Why in E

Key of E

E major is arguably guitar's most powerful key. The open low E and high E strings ring sympathetically as the root, while the open B provides the fifth. This triple reinforcement gives E-based riffs and chords unmatched depth and volume. E is a beginner-level key on guitar because both the low E and high E strings ring as the root, and the open B is the fifth — three open strings reinforce the tonic chord. Beginners will find this key approachable since most chords use open voicings with minimal stretching.

Voice Leading

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

Scales for Improvisation

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

swing4/4 · 32 bars · Form: AB

Chords: E7, EMaj7, G♯, A, F♯7, C♯m7, B7, G♯aug, AMaj7, E, B7/A, B/F♯, E/G♯.

Scales for Improvisation E bebop, E bebop major.

Diatonic chords: See all chords in the key of E