Two days is honestly not too long of a wait. People have waited weeks, sometimes even months before being approved.
If you are still not approved in a week, I suggest contacting an audio moderator. You can find a list of moderators in the FAQ.
<a href="http://www.newgrounds.com/lit/faq">http://www.newgrounds.com/lit/faq</a>
KILLY12
about 5 or a week