From your supplied Real Book photo · B♭ · 4/4 · Medium blues. B♭ and E♭ remain major triads; B♭7 and F7 remain sevenths. Four-voice triads double one chord tone; compact triads use 1–3–5, while seventh-chord shells use 1–3–♭7. No melody reproduced. Voicings are generated practice suggestions, not printed fingerings.
Unique Chords in Tune (4)
12-bar chart · click any chord
Printed changes, carried through unmarked bars. In m.4, B♭ continues for beat 1; B♭7 is read as entering on beat 2 from its placement after the triplet. That timing is an interpretation of the handwritten spacing. No extra turnaround added.
1. Neck Position Lock (Minimize Hand Movement)Locked to Frets 1–4