Atari-Midi Archives

Hi,
I've just joined and dont know anything about atari software and steem 
and wonder if anyone can help.
I use windows xp and have steem running ok. I've been trying protrack 
and cubase lite. Although they run ok and play the songs that come 
with them, there is no sound. Can anyone advise how to get sound.
Also when using the record function on these, is it possible to input 
from the computer keyboard. Any help/advice appreciated.
thanks.