You can find the program to this adress
There is a Falcon player too that replay the musics at 50khz 16 bits on this computer
Including some musics very well ripped (most of them I think)
I I can't remember where I downloaded them...
Maybe evl sent them to me, not sure
Quartet is the digital 4 tracks editor that had the best sound quality on the Atari ST hardware afak (almost as good as on Amiga) but it took a lot of the computer power so it wasn't appropriated with animations (ingame and demos)
I'm working on a ST music basic site, I hope I'll have the motivation this time... :(