Where do you get midi files for synthesia?

This is an easy one to answer.

Get legal and licensed MIDI Files from Hit Trax by following the link in our company profile. This means that we are not a free (illegal) download web site but our prices are very fair, particularly for bulk orders over 3 songs and we have generous discounts and (legal) free MIDI Files when in a purchased block. You get personal service and local call rate phone numbers in the USA, Australia and UK should you need technical support.