[Feature Request] Play sounds simultaneously

[Buzztr0n]

A great addition to the current soundboard would be the ability to play multiple sounds at the same time. It could be a changeable option, allowing the user to switch between "stop previous sound when playing new one" (how it currently works) or "allow overlap with previous sound when playing new one".

A third option that could be added to these other two would be "fade transition between previous and new sound".

[WarWolfen]

This is kind of a duplicate to #24. It is not exactly it, but similar enough to have the same usage scenario.

[sergix44]

For certain aspects, it's also a duplicate of #13, these issues all have the same end purpose.