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