Khurshid Anwar's Ragmala
Ragmala is a set of 10 tapes. Each side is about 20 minutes long so that the whole lasts for more that 6 and a half hours!
The set contains an anthology of more than 90 common ragas performed by prominent musicians of the sub-continent belonging to various gharanas. Each rendition is preceded by a brief description of its characteristics. The set was jointly produced by EMI Pakistan and PNCA.