On the site's compatibility section, for all AGI games available for the Apple IIgs (e.g. http://www.scummvm.org/compatibility/DEV/lsl1/), it says:
"Apple IIgs version has no sound"
But I'm pretty sure that hasn't been the case for a very long time, right? All AGI IIgs games I have tried have both music and digitized sound under ScummVM (often, maybe even always, actually being the best-sounding AGI version, too).
AGI games compatibility: "Apple IIgs version has no sou
Moderator: ScummVM Team
I can confirm that IIgs sound seems to be working. I tested the following in v1.8.1 and listened for the theme music and tried some sound effects in a few games.
Black Cauldron
Gold Rush
King's Quest 1
King's Quest 2
King's Quest 3
King's Quest 4
Leisure Suit Larry 1
Manhunter New York
Mixed-up Mother Goose
Police Quest 1
Space Quest 1
Space Quest 2
Black Cauldron
Gold Rush
King's Quest 1
King's Quest 2
King's Quest 3
King's Quest 4
Leisure Suit Larry 1
Manhunter New York
Mixed-up Mother Goose
Police Quest 1
Space Quest 1
Space Quest 2