The Ab Minor 7 b5 (A Flat Half  Diminished) Arpeggio contains the following notes:

Ab – Cb – Ebb – Gb

Open Position

Here’s how to play the Abm7b5 arpeggio in the open position.

Minor7b5-Arpeggio-Frets-Key-A-Pos-Open-Shape-0
Minor7b5-Arpeggio-Notes-Key-A-Pos-Open-Shape-0

A Flat Minor 7 Flat 5 Arpeggio CAGED Positions

Here are the 5 CAGED positions for the Abm7b5 arpeggio (notes and tabs).

4th Position (lowest fret is 4):

Minor7b5-Arpeggio-Frets-Key-Ab-Pos-4-Shape-1
Minor7b5-Arpeggio-Notes-Key-Ab-Pos-4-Shape-1

6th Position (lowest fret is 6):

Minor7b5-Arpeggio-Frets-Key-Ab-Pos-6-Shape-2
Minor7b5-Arpeggio-Notes-Key-Ab-Pos-6-Shape-2

9th Position (lowest fret is 9):

Minor7b5-Arpeggio-Frets-Key-Ab-Pos-9-Shape-3
Minor7b5-Arpeggio-Notes-Key-Ab-Pos-9-Shape-3

10th Position (lowest fret is 10):

Minor7b5-Arpeggio-Frets-Key-Ab-Pos-10-Shape-4
Minor7b5-Arpeggio-Notes-Key-Ab-Pos-10-Shape-4

12th Position (lowest fret is 12):

Minor7b5-Arpeggio-Frets-Key-Ab-Pos-12-Shape-5
Minor7b5-Arpeggio-Notes-Key-Ab-Pos-12-Shape-5

Further Reading:

guitar course pic yellow