switching Pulseaudio Alsa vv

[Milton]

Dear List,
I'm running Lucid and Orca 2.91 on my machine. I create an account for 
my son. He wanted to run his facorite piano application Synthesia for 
Windows. I tried to run Synthesia in VBox but the result was not good 
enough. I tried it now in Wine and the result is good exept for the 
sound. There is no sound when starting synthesia.
Maybe Synbthesia prefer Alsa?
Is there a way to switch form Pulseaudio to Alsa for trying to use 
Synthesia? Can you telle me how to do so?
Thank you in advance.
Milton