It looks like I didn't research the corrections for the Inca soundtrack enough. It looks like Douieb should be credited for most of the music on Inca I, but Callet did a few of the tracks - SierraHelp.com has the official soundtrack CD for the first game which notes which tracks are whose, and I missed that. Although its credits are not entirely correct either, as I know J. M. Marrier should be credited on Inca People. IMDB has Douieb as arranger for both albums, and only mentions Callet for SFX on the second game. Ugh! Unreliable sources. It also looks like the track named "Accla" should instead be "Aclla".
On all the soundtracks where we know there were multiple contributors, it would be delightful to know whose tracks are whose. I could guess of course (I've noticed each of Sierra's composers have a bit of their own style you can follow from work to work) but I'd love to know for certain.
OK, so that's:
- Inca & Inca II now credited to "Album Artist: Gilles Douieb & Charles Callet" (in that order) with per-track tags marking whose is whose, and listing J.M. Marrier for Inca People.... though it might deserve to be Marrier & Callet together, but I'm leaving as just Marrier until/unless I get confirmation.
- LSL5 all tracks credited to collaboration between Craig Safan & Chris Braymen
- QFGII all tracks credited to collaboration between Chris Braymen & Mark Seibert
- SQIV & III credited as "Album Artist: Various Artists", with SQIV tracks as Ken Allen, Mark Seibert, Rob Atesalp and SQIII tracks as Bob Siebenberg
Now that all of this is done, I'll leave it in someone else's hands to get all of this information into MusicBrainz. They have albums for just a few of the QS CDs on their site, sometimes with incomplete or differing information... for example, they have a KQVI album listed, but have a "Seagull Theme (Opening Movie)" entry as Track #2, which causes my album imported into Plex to show me as missing a track.