Audio Library Website

I have a library of audio clips, and I need someone good at working with audio files, who can create a user interface for my online library of audio clips. This is a website that allows users to listen to files on the site, or download them. I need a nicely designed, functional site that is easy to use, and looks professional. SEO functionality is vital. The concept of a library is key to understanding how this website will operate. Audio files will be saved in an online server, on a database. The database will include several fields, which will correspond to the search mechanism on the front end. Please only serious bids, if you've done this sort of thing before and know what you're doing. Ideally, I would be able to see some work in a similar area in your portfolio. Thanks for your time.