Diploma

Hi,A postgraduate Diploma is a shorter qualification than a Master's degree, although at the same academic level. Whereas, a Master's degree is made up of 180 credits (taken from exams, assignments, and so on), a postgraduate Diploma is 120 credits. With academic courses, the biggest difference between a postgraduate Diploma and a Master's degree is that a postgraduate Diploma doesn't involve having to do a dissertation. You will most likely be assessed by exams, assignments, coursework or a combination of these. Beyond this, however, you can expect the level of work required to be similar to other postgraduate courses, especially in terms of content.

Hi Ujjawal,
If you have interest in music, you can go for sound production course, which is a lucrative career course. Sound Engineering is a creative work and an individual who can think out of the box can make their mark in the Industry. The scope of sound engineering in India is huge, with immense potential for growth in the entertainment industry. The demand for the sound engineers is increasing day by day and the sound engineering professionals are being recognized for their efforts in the field of music and sound. Moreover with the surge in the field of Media and Communication and technological advancements happening in the field, the scope for Sound Engineers, Audio Technicians, etc. Has risen remarkably in the past few years or so. You can find relevant institutes on this link:
https://www.shiksha.com/mass-communication-media/music-sound-production/colleges/colleges-Delhi-ncr.