The #music channel on Slacknet allows people to share their audio files by loading an mIRC script which gives them the ability to search other user's audio files and also share theirs in return.
You can download the latest version TuneMan here:
Click to download TuneMan v0.1a3
Note: The script is currently in the alpha stages of development, so when a new version of the script is announced in #music (see the topic of that channel), it's imperative that you upgrade to the newest version.