What key is I Concentrate On You in?

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 D to D (ascending unison), D to G# (ascending tritone), G# to C# (ascending perfect fourth), C# to A (descending major third), A to D (ascending perfect fourth), D to G (ascending perfect fourth), G to C# (ascending tritone), C# to F# (ascending perfect fourth), F# to F# (ascending unison), F# to B (ascending perfect fourth), B to E (ascending perfect fourth), E to F (ascending half step), F to E (descending half step), E to A (ascending perfect fourth), A to E (descending perfect fourth), E to D (descending whole step), D to G (ascending perfect fourth), G to A (ascending whole step), A to D# (ascending tritone), D# to D (descending half step), D to G (ascending perfect fourth), G to F# (descending half step), F# to B (ascending perfect fourth), B to C (ascending half step), C to F (ascending perfect fourth), F to D (descending minor third), D to D (ascending unison), D to B (descending minor third), B to E (ascending perfect fourth), E to A (ascending perfect fourth), A to A (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 A to D 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.

ballad2/2 · 94 bars · Form: AA'BA''

Chords: Re, ReMaj7, Sol♯m7♭5, Do♯7, Lam7, Re7, SolMaj7, Do♯m7♭5, Fa♯7, Fa♯m7♭5, Si7♯5, Mim, Fadim7, Mi75-/ces, La7, Mim7, Re6, Sol6, La7♭9, Re♯9, Re69, Solm7, Fa♯m7, Si7, Do7, FaMaj7, Rem7, Rem/des, Sim7♭5, Mi7, La, LaMaj7.

Scales for Improvisation Re bebop, Re bebop major.