[Asterisk-Users] .gsm files

[firedude at shorelinuxsolutions.com]

Hi guys,
Being a true Linux geek, I've never been too much into sounds or sound 
files other than a few .mp3 songs I got.  My question is pretty 
straightforward and simple.  I see that the music format of choice for 
asterisk is .gsm.  What can I use to listen to files in .gsm format and 
what is the most effective way of recording files into .gsm format?

The last part of the question is pretty simple as well.  I have a
soundblaster live pci 16.  Is this pretty sufficient for asterisk?
Thanks in advance.
AJ