MSP stands for MUD Sound Protocol. If you wish to use sound (and your client supports it), type ‘config MSP’ to activate it. You then need to download the God Wars II soundpack, which was created by Oberon:
http://www.godwars2.org/msp.php
Download and unzip the file into the appropriate directory. If you’re using MUSHclient, create (and use) a C:\MUSHclient\msp directory.
While sound is active, you may type ‘sound’ to toggle different sounds.
Note that more sound files will be added in the near future, so suggestions are always welcome!
If you have trouble getting MSP to work, try reading this thread:
http://clanscw.brinkster.net/godwars/topic.asp?TOPIC_ID=2543