I'm happy to report that due to a
bug ticket I filed 3 weeks ago, ScummVM will now allow the "Prefer digital sound effects" checkbox in the engine tab menu for SCI1.0 games to actually function. That is, beforehand enabling or disabling this option would make no difference and all SCI1.0 games would output digital sound regardless. It worked fine for SCI0 and SCI1.1 games, but SCI1.0 was strangely ignored in the code checks (it specifically initially only checked for SCI0 and SCI1.1 games). I stated this years and years ago on the ScummVM forums and I'm surprised it still hadn't been known or addressed until now. I had been using DOSBox all this time and just wasn't aware. I was fiddling with ScummVM again recently and noticed it. So it's finally fixed. Hooray!