You can also use choose("shoot1", "gun2", "firerocket_01")
in case your sound files don't match a common nomenclature.
Pro tip:
Create a custom built-in function. "Play audio"
Create some parameters e.g. soundname, posx, posy, volume
On "play audio" : Audio: Play sample "soundname" at position "posx, "posy", volume: "volume"
Then you can use the function in any point of your event sheets and have a common method to play sounds.
E.g.
-> On bullet collides with player: Call function "Play audio". soundname = choose("hit1","hit2"), posx = player.x, posy = player.y, volume = 0