Grace notes playback issues: some notes are in the wrong order
Describe the bug Here's a Tweet from a composer who described some really bad grace note issues with playback. They're really bad. Seems to be mainly a MS Basic (Fluid) issue. Muse Sounds seems to handle them better.
https://twitter.com/sam___tsao/status/1604442763717656577
Score: https://www.dropbox.com/s/gp9wxij8766guor/01_grace-notes-fragment.mscz?dl=0
Some of the acciaccatura notes are happening in the wrong order. One of them is occurring after the main note they are preceding.
- Measure 4. (16 secs)
- Measure 6. (25 secs)
Also sometimes when there are many grace notes (3, 4, etc) they really need to be allotted more time to play, and possibly even start before the beat of the main note, so that they aren't barely recognisable. I don't know if the underlined part is always preferred, but doing that would definitely help in situations like this:

Yeah. I think we need another pass on Grace notes in general. Thanks @Harmoniker1
I've also been having grace note playback issues, this issue came up during my search but let me know if I need to make a separate issue (or multiple):
Grace notes after trills (like this) are just skipped completely, and cause the following note to lose sustain:
While grace notes before trills cause the trill to be played extremely quickly (although the default trill speed is very slow so I'm not sure which is worse)

I'm using Muse Sounds for this, MS Basic behaves slightly better but has its own issue where the grace notes in the top example are played extremely slowly.
Here's the score if you want to have a look: Nocturne.mscz.zip
What's worse, if you use the trill line instead, as I've seen in some pieces with grace notes after trills, it trills the grace notes! It shouldn't be doing that.
What's worse, if you use the trill line instead, as I've seen in some pieces with grace notes after trills, it trills the grace notes! It shouldn't be doing that.
Could you log this one separately? I think it's a different issue - but one we should put a priority on. Otherwise, I'd worry it'll be missed. Thanks!
I've also been having grace note playback issues, this issue came up during my search but let me know if I need to make a separate issue (or multiple):
Yes, I think this should be a separate issue. We'll most likely bunch them together and try to tackle them for 4.1 (or 4.2)
STATUS UPDATE: fix for this from @RomanPudashkin is in progress and will more likely make it into 4.3 if it doesn't sneak into 4.2 at the 11th hour :-)
Fixed in #20453