So I'm listening to a song, and the pitches used are these:
C, D♭, E♭, F, G, A♭, B♭
Seems like the key of A♭ major, right? Or perhaps F minor. (Indeed, the song seems to be in a minor key.)
But no, the tonic is clearly C. I mean, 85% of the chords are C minor. (The others are F minor, G minor and B♭ major.) And most of the melody lines start or end on C as well. And the baseline is mainly C. It seems clear that C is the tonic here.
So what's going on? This scale nearly matches the C minor scale, except shouldn't that be D♮, not D♭? Is that an accidental, or is this actually a different key? Clearly the G minor and A♭ major chords include D♮, not D♭. However, the melody unwaiveringly uses D♭. I'm not sure what's going on...