Flash can load MP3s from remote domains, but it cannot read certain metadata (eg. ID3 tags, waveform/eq/spectrum data) unless granted permissions via a crossdom

Flash can load MP3s from remote domains, but it cannot read certain metadata (eg. ID3 tags, waveform/eq/spectrum data) unless granted permissions via a crossdomain.xml policy file. For hosting, the SWF should be on the same domain as the HTML document or JS-Flash communication will be restricted (or, use the cross-domain version of the SWF.)