Synthesia is a very fun way to play and learn the piano even though you do not have an actual piano. Synthesia is a powerful piano simulator that lets you learn and play piano directly from your computer. Synthesia can teach you to play piano with ease and fun, and of course you can play the piano according to your skills. Synthesia allows you to play a custom MIDI files, as well as linking with MIDI devices, multiple practice features, such as “Melody Practice” which pauses the song whenever the user misses a note.