Yngwie Malmsteen - Blues guitar lesson

Amazing blues guitar solo
The blues scale is a hexatonic scale consisting of the minor pentatonic scale plus the ♯4 or ♭5 degree, however, since blues notes (or blue notes) are alternate inflections, strictly speaking there can be no one blues scale. As named in contemporary jazz theory its use will be based upon the key and not the immediate chord, unlike some chords used in jazz.

Yngwie J. Malmsteen - Amazing blues guitar solo

The "blues scale" may also be a diatonic scale with lowered third, fifth, and seventh degrees and blues practice is derived from the "conjunction of 'African scales' and the diatonic western scales". Steven Smith argues that ""to assign blues notes to a 'blues scale' is a momentous mistake, then, after all, unless we alter the meaning of 'scale'"