When a melody is in Major, but the bass line is in Minor, what key is it?
I want to refer to WAR's LowRider song,
http://www.geocities.com/Hollywood/Lot/1094/LowRider.mid
the melody uses notes:
D Eb F Bb
which I would interpret as being in Bb Major, because
D=Major 3rd
Eb=Perfect 4th
F=Perfect 5th
Then the bass line is mainly based on the following notes:
Bb Db Eb F Ab
which I would interpret as being in B minor Pentatonic, hence B Minor, because
Db = Minor 3rd
Eb = Perfect 4th
F = Perfect 5th
Ab = minor 7th
Before this, I never attempted to transcribe the melody, I just learn the bass parts, so all the while I know the song as in Bb Minor!
I understand that the Minor Pentatonic notes are also in the Blues scales notes, and that the Blues scales can be used in any tonality, does that mean that the song is blues?
I am really confused....

I want to refer to WAR's LowRider song,
http://www.geocities.com/Hollywood/Lot/1094/LowRider.mid
the melody uses notes:
D Eb F Bb
which I would interpret as being in Bb Major, because
D=Major 3rd
Eb=Perfect 4th
F=Perfect 5th
Then the bass line is mainly based on the following notes:
Bb Db Eb F Ab
which I would interpret as being in B minor Pentatonic, hence B Minor, because
Db = Minor 3rd
Eb = Perfect 4th
F = Perfect 5th
Ab = minor 7th
Before this, I never attempted to transcribe the melody, I just learn the bass parts, so all the while I know the song as in Bb Minor!
I understand that the Minor Pentatonic notes are also in the Blues scales notes, and that the Blues scales can be used in any tonality, does that mean that the song is blues?
I am really confused....


