Every dojo I've been a member of, and many I've visited, indeed have an emphasis on the dojo as Separate Space from the rest of ones daily world, starting with removal of shoes and bowing in, perhaps a period of breathing or meditation. Some have insisted on no talking others on no extraneous chitchat.
Janet that is an accurate description of my experience as well. It's indeed why I asked the original naive question. To date, reading this thread, it seems most people would explain that music would only interfere with aikido instruction and practice. I think Mark's thread from 2006 is worth reviewing http://www.aikiweb.com/forums/showth...t=aikido+music
as well. The most frequent explanation or answer, unfortunately, may remain -- "because we've always done it this way".