Here, Raga-Mala presents a source of information about Indian vocal styles.
For starters, you may wish to have a read through Andrew Buhr's Beginner's Guide to North Indian Classical Music; the page linked here pertains to vocal styles.
Raga-Mala hopes to add further articles and information to this page. We welcome any such contributions from our members, patrons, or others who simply wish to help expand this section of our web site. Feel free to contact us.