According to Osho, Baba Alauddin’s remark does not confess failure to find a true master; it proclaims realization. Nada and sur are the innermost, infinite dimension—there is no going beyond them. All sages concur that at the ultimate depth an inner music (Omkar) arises; crossing it is impossible because the seeker dissolves into it.
He wasn’t stuck; he reached the deepest inner music, and there’s simply nothing beyond it.