From the museum's own site, in particular the janisarry band general information part I take it, this is the Çorbacıbaşı: He is the company commander and a high-ranking officer. He is a conservatory graduate. He is highly knowledgeable about Turkish music and capable of representation. He is the administrative chief of the Mehter band.
He remained aloof of the performance, the "directing" being done by the Mehterbaşı.