audio/mp3 will work better for you.
Best regards
Peter De Berdt
Actually - the correct mime type is ‘audio/mpeg’, not ‘audio/mp3’
http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7
http://www.iana.org/assignments/media-types/audio/
Cheers, -Andrew
