I have a naive question about sound drivers: Squeak VM 3.9-8 ships with 2 
sound drivers (well 3):

	vm-sound-null
 	vm-sound-ALSA
 	vm-sound-OSS

How does Squeak, at runtime, decide which of them is used? 

Is there a way to "ask" for one of them to be used first. For example, Linux 
can have either ALSA or OSS or both available, what is the process of 
deciding which will be used when sound is to be played?

Thanks Milan