Audio clips can get stuck at 100% volume #110
Description
When many instances of a single short clip are triggered in quick succession, Howler can get into a state where subsequent changes to the volume of the clip are ignored. This has the effect of the clips always being played at full volume even if the volume on the play action is set to less than 100%.
After some investigation it appears that Howler's internal loadQueue is getting stuck with a stop event from the clip which is never removed from the queue, preventing the volume change events from ever firing after the clips start playing:
This appears to be an unintended side effect of this fix which was necessary to fix an issue with looping clips sometimes never stopping: clockwork-dog/howler.js@63acd80
Reverting this change seems to prevent the issue from happening, I believe due to the fact that the stop event is not always being emitted with the above change that passes through the internal flag to the queued stop event:
https://github.com/goldfire/howler.js/blob/a2a47933f1ffcee659e4939a65e075fa7f25706c/src/howler.core.js#L1138
The reasons for this are tied up in the core of Howler's logic and will need some thorough investigation to unpick.