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I'll Remember April in D
I'll Remember April in D: this pop standard turned jazz vehicle moves from a bright major opening to minor mid-section. Bebop Major and Dorian cover the two contrasting tonal areas — Mixolydian drives the dominant passages throughout. Chords: Em7b5 – A7 – A7/c – F#m7 – B9 – Em7 – A7b9 – D – D#Maj7 – D69 – D6 – G9 – CMaj7 – Bm7 – E7 – DMaj7 – Gm7 – C7 – FMaj7 – Dm7 – F6 – Em11 – C#m11 – F#9 – BMaj7 – B6.
Key of D
D major is one of guitar's most resonant keys. The open D string acts as a droning root, and the open A string provides the fifth. This gives D-based strumming a wide, ringing quality that flatpicks and fingerpicks love. D is a beginner-level key on guitar because the open D and A strings provide a powerful bass foundation, and the open high E is the 2nd scale degree adding brightness. Beginners will find this key approachable since most chords use open voicings with minimal stretching.
Voice Leading
The bass line moves through E to A (ascending perfect fourth), A to A (ascending unison), A to F# (descending minor third), F# to B (ascending perfect fourth), B to E (ascending perfect fourth), E to A (ascending perfect fourth), A to D (ascending perfect fourth), D to D# (ascending half step), D# to D (descending half step), D to D (ascending unison), D to G (ascending perfect fourth), G to C (ascending perfect fourth), C to B (descending half step), B to E (ascending perfect fourth), E to D (descending whole step), D to G (ascending perfect fourth), G to C (ascending perfect fourth), C to F (ascending perfect fourth), F to D (descending minor third), D to F (ascending minor third), F to E (descending half step), E to C# (descending minor third), C# to F# (ascending perfect fourth), F# to B (ascending perfect fourth), B to B (ascending unison). 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 B to E by perfect fourth.
Scales for Improvisation
D 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, D Mixolydian adds the flat seventh for an authentic blues-rock edge.