the idea of indian classical music is to find your own personal tonic (the 'Sa') with your guru assisting. everything else in a raga is around that tonic. the problem with a harmonium is the notes are tuned to standard western classical music frequencies and you pick one of these notes as your tonic, the closest comfortable for you. its also comfortable for other accompanists to tune their instruments (independently of you) to. but its a compromise and especially one that works well for the stage. what is lost however is the search for your own personal tonic, thereby a whole different approach to music making. indian classical music is by the individual, for the individual, a kind of meditation but tbh it got compromised long b4 harmoniums came along when played for kings or later the rupee paying public. of course doesnt mean standardistation isnt good or cant produce 'good music' but the core reason is kinda gone deep underground now.<p>i guess only in dhrupad they get very close to this approach. you would take forever to tune the tanpura to your tonic and 5th (or 4th) above (depending on raga), low tonic. now if your tonic isnt a standard note, you would first tune the tanpura to your tonic (by humming), then you understand the 'relationships' between your tonic and your 5th (or your 4th) better by tuning (ie listening deeply to) the tanpura cos you cant simply dial up a standard note. its a whole different world.<p>one could argue why not tune the harmoniums notes into your personal tonics and 5ths and 4ths and all other notes but of course its tedious, the other deeper idea is in indian classical music gurus wouldnt quite fix the position of a 'note' in the raga, its fluid, it emerges, its rediscovered (the ahha happens here) etc.<p>what is happening now is as harmonium is immensely popular they start to rewrite history and say well indian classical music wasnt about finding your own tonic after all...u are no special...u were waiting for our standard notes...u are just like us....but not as good as our beethovens and mozarts ;)