Bebop scales
A bebop scale is created by adding either:
Because bebop scales are made up of eight notes it is likely that if you start a typical 8th note run on a downbeat with a chord note (root, 3rd, 5th or 7th) the other chord notes will also fall on strong beats. This obviously means that notes to be avoided such as the 4th (see above: wrong notes) become passing notes. (Ex 11b). Bebop scales should only be used as scales, not to construct melodic phrases otherwise the added chromatic notes will no longer be passing notes and will not fit the chord.
ex 11b: Bebop scale
As the Mixolydian and Dorian bebop scales contain identical notes, the same scale can be used across a IIm7-V7-I sequence, as with the modal method (chapter 5).
The bebop scale leads nicely to the 3rd of the repeated IIm7 to end up with a very satisfying jazz (bebop) style. (Ex 11c)
ex 11c: Bebop scale covering a repeated IIm7-V7 progression.