1987 French commercial software program , written by Patrick Pedelaborde.
Not being a musician or French I limit myself to playing the demo for this program and later @ 7:03 another track on the disc - an excellent CPC version of the theme from the Third Man (The Harry Lime theme).
As ever, use headphones or a Hi=Fi with good stereo separation!
https://www.youtube.com/watch?v=9ZVH7PWrpNg
Links:
https://www.cpc-power.com/index.php?page=detail&num=14734
https://cpcrulez.fr/applications_music-intermusic.htm
https://en.wikipedia.org/wiki/The_Third_Man
Not emulated - original hardware and software.
Please note that the aspect ratio for this YouTube video is 16:9 but the CPC monitor
has an aspect ratio of 4:3 so you may wish to adjust your viewing device accordingly.