Click File > Open to import the MP3 file.How do I convert MP3 to MIDI for Synthesia? Track names and other descriptive information may be stored with the MIDI data. Song, sequence, and track structures, tempo and time signature information, are all supported. MIDI Files contain one or more MIDI streams, with time information for each event. The 5 Best Websites for Free MIDI Files are BitMIDIĪll Genres with more Pop, Rock & Jazz files. Once in a Songs category, click on a (+) sign in the bottom right corner of the screen.Once in Settings, pick a Songs category form the right-side menu.Click on the Settings button on the main screen.How do I download MIDI files for synthesia? 6 Which is the best site to download free MIDI files?.5 How do I import MIDI files into Synthesia?.1 How do I download MIDI files for synthesia?.