Following MIDI files were optimized for DRSSTC use. MIDI channels were arranged such a way that there is always maximum of one note at a time per channel. Files include bass, melody and 3+ channel files also include chords and other melodic lines. Most files are perfectly synchronized with its mp3 audio files so that they can be played simultaneously. Note that songs were synchronized with FL Studio, the tempo may not be correct when using some other MIDI processing software. Contact me via email (novotm90@fel.cvut.cz) in case you have any questions.