<p>well, have you looked at this page?:
[Harvard</a> College Admissions § Applying: Supplemental Application Materials](<a href=“http://www.admissions.college.harvard.edu/apply/application_process/supplements.html]Harvard”>http://www.admissions.college.harvard.edu/apply/application_process/supplements.html)</p>
<p>I’m pretty sure they mean that they DON’T WANT the Common App arts supplement.
I’m assuming you’ll send a music supplement, and you’ll have to do that by mail. 
I sent mine via mail. :)</p>