Argh! Anyone expecting anything near the aural joy found on the Ys Book 1 and 2 CD soundtrack (as I was) is in for a rude awakening with Music From Ys 1 (and 2, for that matter). Tinny beeps, bops, and static percussion noises rule the first 35 or so minutes. It almost sounds like it was composed on... the PC Engine itself! In fact, when you first hear the new versions of the old PSG-generated songs on this disc, you'll swear they're the same as from the game. Upon further listening, however, the songs appear to have been slightly enhanced (the key word here is "slightly").
There are two bright spots to all this: 1) You finally get to know the names to all those great songs (well, great when they're performed with decent-sounding instruments), and 2) You'll finally know how Ys would have sounded had they released it on a chip rather than a CD. Joy.
The last batch of songs are, thankfully, fully arranged and do the Ys/Falcom legacy justice. In fact, a couple of them were later used on the "Perfect Collection" discs in slightly enhanced form. In summing up, if my 2 "reasons" for buying Music From Ys work for you, or if you really want the handful of almost Perfect Collection-quality tracks, these CDs are for you. Otherwise stay away.