A# m7b5 — C6 Pedal Steel
A# m7b5 has no bar or slant position on the C6 Pedal Steel with the pedals up.
A# m7b5 stacks A# – C# – E – G#, and with every pedal up and every lever at rest no bar position on the C6 Pedal Steel sounds that set: at every fret, and on every short slant, a tone it needs is missing or too few strings carry it.
A pedal steel does not stop there. With Pedal 6 engaged, a straight bar at fret 1 spells it — one change is the fewest it takes, and the copedent page lists every position, 8 in all.