Complex sentence: It was processed by N. C. Sen Gupta and orchestrated by Addepalli Ramarao, who was, however, credited as one of the film's music directors in the opening credits.
Split into simpler sentences: It was processed by N. C. Sen Gupta and was orchestrated by Addepalli Ramarao. The latter, however, was credited as one of the film's music directors in the opening credits.