Here url to mine demo midi.
http://fedchenko-stas.narod.ru/Demo_Midi.rar
Here 4 demos songs, and 1 full version that you could estimate.
4-songs are made with the help of styles which are built - in in PSR-550
1-I will survive, has been made on a computer in Cakewalk Home Studio 2004. - one of soundtracks professionally made by me.