Play Panel behaviors
I prefer to post once I've come to conclusions and can provide steps to replicate, but in third and fourth issues listed below, behavior is intermittent so I haven't been able to fully characterize it.
With Loop enabled:
• Loop flag updating: When Looping is enabled MuseScore's the "loop" flags should update anytime the user changes the selection.
When I select a section of music and enable the Toolbar's Loop button two triangular 'flags' appear around the selection, indicating that the selection will loop. But the flags do not update if I then extend or shorten the selection—nor if I make a new selection while Loop button is still enabled. The flags update when the user Plays the score. This has proved confusing to my students. After they make a new selection they notice the flags remain in their previous positions, so they believe they must do something to reset the flags to loop their new selection. And indeed they can reset the flags—but that's needless and cumbersome—and museScore does that for them ...but only after they press Play.
• Continuance vs. rewind: In most audio applications, including MuseScore the space keystroke simply toggles playback between “play” and “pause.”
But during Loop playbackthe space keystroke stops playback AND "rewinds" to the head of the loop. I think it’s logical for the space keystroke to invoke a completely parallel behavior during normal playback and loop playback: pause / continue.
And what if one wants to rewind on pause? In both playback modes Normal and Loop) ”standard" transport controls (or preferences) could govern whether rewind or continuance occurs on the spacebar key.
Perhaps I've overlooked a setting that controls this behavior?
• Delays: I've encountered delays between the end and start of the loop. This happens (here on Mac OS) when a whole measure is selected ... or when the selection ranges between notes that do not constitute full measures. Unfortunately this is an intermittent so I haven't found a trigger, but I've seen on other Macs. And, I think, also on Windows.
• Space bar: As discussed the space bar should toggle (start/stop) playback during Looped playback. And usually it DOES. But during Loop playback MuseScore sometimes gets into a state where the spacebar fails to halt or restart playback. The only workaround is the press the Play (triangle button) in the Toolbar. Restarting MuseScore cures the situation, for a while. Again I can't find a steps to replicate. So my apologies. But I've seen this behavior on several student's computers.