I got this recording from a secondary source, and don’t know who recorded it…” (n.b. somehow, this is among only two identified clips of Khan singing Bhairav: with the other currently being a short excerpt of your ‘Karim Rahim Bande Nawaz‘ bandish sung within an interview with Hafiz Ali https://www.youtube.com/watch?v=S2iLMNuDYc0