Pay What You Want Online - Artists FAQ Page

Could do this with my music. But they do charge 50% of all sales and I
think other deals allow artists to accept donations and cost allot less.
But this one does claim to Promote the Artists. They are based in Canada
and mention promoting Canadian Artists though... Check on one in America...

Pay What You Want Online - Artists FAQ Page

http://paywhatyouwantonline.com/ArtistFAQ.aspx