I have a .mp3, backing track listed as, 'A Lydian ( I am unable to provide the track for your perusal, due to copyright ) , however: when I play 'A Lydian, it does not sound correct. The 'B' Mixolydian', sounds more applicable. Am I missing something, or / is the backing track labeled incorrectly ? I also tried G#, as a 'Leading Tone, however the pitch does not seem to fit. Lydian, has a #4, / Mixolydian, has a
( flat ) b7.
( Correction ) ... I found the "F Lydian Dominant" Scale / which accounts for the dissident quality of the Major 7th / and beginning on the, b7 as a leading tone, my Backing track now sounds Melodic.
The 'Backing Track Label', did not make that distinction.