Dims to Doms 4321 Strings
Always tells us something.
The key/scale of B♭ has 2 flats: B♭ & E♭. When adding flats (going counterclockwise on the Circle of 5ths), the new flat will always be at scale degree 4. E♭ is the 4 in B♭. We already played a B♭ Major scale based on scale pattern 51 in a previous session. This is scale pattern 52 pattern of our 7 Majors scale system and is played in our alpha-tone order (lowest root → highest in pattern → lowest in pattern → back to starting root). This pattern populates octave 53 (the octave with string address of strings 5 & 3 - scale pattern 51 also uses octave 53). We first train with the scale in P1 (we begin the scale with the 1 finger). We can also train in P0 and this would show us how the form moves up the board (we begin the scale with the 2 finger with the index 'playing' the nut). Next, improvise with the B flat Major scale for a few minutes. And, consider some of the chords which come out of this tone set → B♭, Cm, Dm, E♭, F, Gm (in a position, alphabetically, these follow the CAGED sequence - like all 'fixed position' scale forms).
B♭ type chords include B♭, B♭5, B♭m, B♭Maj7, B♭7, B♭6, B♭sus9, B♭m7.
As previously introduced, flat Majors are Major chords which are outside (in between) chords in a Major key center. They sit in the gaps between diatonic chords of a key. We get their names by comparing to what is 'normal' in Major keys. In C, the normal E type chord in C Major is E minor. If we flat it (lower it one half step), and make it Major (basic Major triad), it can be viewed as a ♭III [uppercase III is a Major chord in letter position III]. This is a Major chord built on the lowered 3rd of the key. Same for the 7. The normal 7 is B diminished. Flat it, make it Major…B flat Major. The complete flat Major sequence is ♭II, ♭III, ♭V, ♭VI, ♭VII. In C, these chords are D♭, E♭, G♭, A♭, & B♭. There is no ♭IV because this chord would be F♭, which is E Major, and E is in a different class [it’s a secondary Dominant = V/vi in C]. Flat Majors are most common in rock music. A great example of flat Majors in action is the band Linkin Park.