sammy- I think its totally fine…i see no reason why it wouldnt be allowed..Ive also been in the BY systen where the preached the whole music affecting you nishama thing (WHICH IS TRUE) and how the song- here were talking music can penetrate you neshama- and I quote (my teachers) – why is it so bad to listen to even classical music? becasue we dont know what the machshavos were of the composer and if it was through machshavos raaos etc…then it can badly affect your neshama- I dont disagree but thats a VERY VERY VERY high level to live by….
in all honesty using it for productions/backround music/ calming etc..i see no reason why classsical or even yanni should be issur/a problem!