No - D7 won't necessarily sound bad, but doing so will have consequences that are worth knowing about.
D7 contains the notes D, F# A & C.
Of those notes, F# is foreign to the key of C. However its not foreign to the key of G major which is one of C major's closest major relatives. In fact being the seventh degree of the G scale it has a strong tendency to rise to G, so strongly that it can cause you (and your listeners) to perceive a change of key (from C to G in this case)
So foreign notes and chords will always have greater or lesser effects, which are either good or bad depending on how they're handled.
|