That only works for a single player map; for multiple players to hear the .wav, use this System:
(All Players, [TRY TO HAVE NO OTHER WAITS HERE])
Conditions:
'Current Player' suffers 'Death' of 'Exactly' '1' 'Mineral Patch 1'
Actions:
Wait xXx Milliseconds
'Set Deaths' for 'Mineral Patch' owned by 'Current Player' to '0'
Preserve Trigger
(Any Players who will hear it)
Conditions:
'Current Player' suffers 'Death' of 'Exactly' '0' 'Mineral Patch 0'
Actions:
Play *.wav
'Set Deaths' for 'Mineral Patch' owned by 'Current Player' to '1'
Preserve Trigger
Difference is that now it activates for all involved, because with the Switch once it is read once, you'll have to wait ages again till its ready for another person!