Combat Log Scanner watches your combat log for SPELL_CAST_START events and checks them against a per character supplied list and if it finds a match it will alert you with a sound and output to MikScrollingBattleText if it is installed
To use a custom sound file for the alert just put a file named alert.mp3 or alert.ogg into the addon directory before starting WoW and type:
- for mp3 "/cls custommp3 on"
- for ogg "/cls customogg on"
use "/cls" to access the options