{title: https://groups.io/g/ChordPro/message/1092}

[Bb6] comes out as Bb6
[Bb7] comes out as A#7
[Bb] comes out as  A#

#{chord: Bb6 base-fret 1 frets N N 3 3 3 3}
#{chord: Bb7 base-fret 3 frets N N 1 1 1 2}
#{chord: Bb base-fret 1 frets N 1 3 3 3 1}
