In the case of Rao and Sapru Films Pvt. Ltd. v. Alok Kumar, the Bombay High Court analysed a contractual dispute between a producer and a music director–singer over rights in ten songs. The court held that the producer, who had paid consideration and obtained signed assignments, was the copyright holder, and the author could not assert rights after the fact without setting aside the agreements.
Read more about When Authors Sign Away Rights: Producer–Author Copyright Contracts Tested in Bombay High Court