Necromancy, I know.
I too were concerned about which version it was, but considering the sale they had I picked it up regardless.
I remember playing it way back when on my brother's computer, I remember it having music, not just during cutscenes but also in general, unlike this version.
Sad really, part of what made Loom so magical was the background music from Swan Lake while you walked about the strange lands.
Here's hoping one day Gog might come with a more complete version.
I think the verson that always has music was the FMTowns one, and I think it was the only thing that I didn't like in that version because it could get too repetitive.
I am also unsure if the music triggers differ between the CD Talkie and the original EGA version, but the original version had music outside of cutscenes (albeit sometime the music would begin as part of a cutscene). Just not continuously.
It's a shame we don't have the original EGA version here yet, though. It may be missing the voice overs, but it is the better version story-wise and LOOM mythology-wise.
Same goes for no audio drama, which is a very essential part of the game, I'd say much more than the game's manual itself.