yes but keep in mind that this might cause stuttering while the file is being loaded.

usually you create a sound once and keep it (a more sophisticated approach would be only loading sounds in areas of the game where they are needed)

I'm also sure that txesmi's example was meant that way.

when setting up your application you call sndMetalCreate() to create all the sounds needed and you then can play them as much as you want.
once you don't need the sounds anymore (like closing your application) you call sndMetalRemove() to remove those sounds again.