This is from long ago (1989+), but I read it recently: "A Carnatic Music Primer" by P. Sriram (https://sanskritdocuments.org/english/carnatic.pdf https://sanskr

This is from long ago (1989+), but I read it recently: "A Carnatic Music Primer" by P. Sriram (https://sanskritdocuments.org/english/carnatic.pdf https://sanskritdocuments.org/english/carnatic.pdf / http://www.ae.iitm.ac.in/~sriram/karpri.pdf http://www.ae.iitm.ac.in/~sriram/karpri.pdf)