How Deep Is The Ocean in D

How Deep Is The Ocean in D

An Irving Berlin classic with sweeping harmonic motion, a favorite of Sonny Rollins and Chet Baker.

How Deep Is The Ocean in 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 B to E (ascending perfect fourth), E to E (ascending unison), E to A (ascending perfect fourth), A to D (ascending perfect fourth), D to G (ascending perfect fourth), G to C (ascending perfect fourth), C to F# (ascending tritone), F# to B (ascending perfect fourth), B to G# (descending minor third), 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 B 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.