
1) Hindustani music terminology
Found on
https://www.crosswordclues.com/clue/vivadi

Vivādi swaram in a rāgam has a discordant effect with the vādi swaram in it. It may not have a pleasing effect when sounded together, but composers use appropriate phrases so that such discordant effect is skipped or avoided. In western music it is equivalent of the dissonant.
Found on
http://en.wikipedia.org/wiki/Glossary_of_Carnatic_music

In Hindustani classical music, vivadi (विवादि meaning `dissonant`) refers to pitches that are not part of the arohana or avrohana of a given raga. In general, vivadi are not to be played during an improvisation on a given raga. So, for instance, if a raga had the structure S R G m P D N S`, S` N D P m G R S; in that case, r, g, M, ...
Found on
http://en.wikipedia.org/wiki/Vivadi
No exact match found.