Reaching steps:
1. Open tools (Ustawienia systemowe in polish version),
2. "tab" Hardware (sprzęt)
3. open option Sound (dźwięk)
4. In tab sound effects (Efekty dźwiękowe), select your sound file to action.
5. Click a few times - sound don't stop and play it as many times as you clicked :-)
OS version: Linux Mint 17.2 Cinnamon 64 bit
Reaching steps:
1. Open tools (Ustawienia systemowe in polish version),
2. "tab" Hardware (sprzęt)
3. open option Sound (dźwięk)
4. In tab sound effects (Efekty dźwiękowe), select your sound file to action.
5. Click a few times - sound don't stop and play it as many times as you clicked :-)
Sorry for my english.