"chords_d_major_110bpm.mid" is the chord progression that was used to generate all the other MIDI files.

The generated MIDI files are 100% royalty-free for use in your productions. 

Download SongEngine:
https://feelyoursound.com/songengine/

Get ChilloutEngine Extension:
https://feelyoursound.com/chilloutengine-extension/
