I bought this recording from the secondary resource, and don’t know who recorded it…” (n.b. somehow, this is among only two regarded clips of Khan singing Bhairav: with the opposite remaining a short excerpt from the ‘Karim Rahim Bande Nawaz‘ bandish sung in an job interview with Hafiz Ali https://www.youtube.com/watch?v=S2iLMNuDYc0