How to practice S'posin' with play-along tracks?

Use the play-along backing track above to practice S'posin' 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 S'posin'?

For soloing over S'posin', 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 S'posin'?

S'posin' was composed by Andy Razaf / Paul Denniker in 1929. It is a swing standard in 4/4 time. The original key is Bb; this page shows it transposed to A.

What key is S'posin' in?

The original key of S'posin' is Bb. The form is A with 32 bars. This page shows the chart transposed to A.

What scales work for improvising over S'posin'?

Recommended scales for S'posin' 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.

S'posin' in A

Andy Razaf / Paul Denniker(1929)swing

Do Re MiC D E

BPM: 120

Chord Diagrams — S'posin' in A (Guitar)

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FingerNoteDegree

Chord Voicings Closest Voicing

S'posin' in A

Key of A

A major is a rock and blues cornerstone. The open A string delivers a strong root, while both E strings ring as the fifth. Classic A-D-E progressions practically play themselves with open cowboy chords. The open high E is the fifth, reinforcing power. A is a beginner-level key on guitar because the open A string is the root and the open E strings provide the fifth above and below, creating a massive low-end anchor. Beginners will find this key approachable since most chords use open voicings with minimal stretching.

Voice Leading

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

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.

swing4/4 · 32 bars · Form: A

Chords: A, Bm, E7, C♯7♯9, G♯m7♭5, F♯m, B7, A7, Em, D, G♯7, C♯7, F♯7♯9.

Scales for Improvisation A bebop, A bebop major.

Diatonic chords: See all chords in the key of A