The Bb Minor 7 b5 (B Flat Half Diminished) Arpeggio contains the following notes:
Bb – Db – Fb – Ab
Here’s how to play the Bbm7b5 arpeggio in the open position.
B Flat Minor 7 Flat 5 Arpeggio CAGED Positions
Here are the 5 CAGED positions for the Bbm7b5 arpeggio (notes and tabs).