In game, click on your little "EQ" menu button and select "Actions - Audio Triggers". A window pops up. In this window, you can create "audio triggers", this means that every time a specific text (that you define) appears in one of your text windows, EQ plays a certain audio (.wav) file (that you can define, too).
Example:
I created an audio trigger for the text "gain experience", which I combined with a short tone. Every time when "You gain experience!" appears in my main chat window, EQ will perform the tone, so I will be notified without having to look at the window all the time.
You can create multiple audio triggers for many different text parts; For example when spells fade, when somebody tells you something, when a spell fizzles, etc. etc. etc. Just be sure to use the exact text or the exact text part.
In the audio triggers window, you type in the text, choose an audio file and combine those two by clicking on a button. Existing audio triggers cannot be modified, only deleted.
EQ takes the audio files from a specific folder in your EQ directory, where you can add some sound files to.
Good tip: Go to
http://www.research.att.com/projects/tts/demo.html
where you can create .wav files from text!