Advanced Wordpress AJAX MP3 Player

We need an mp3 player for our blog similar to the sample urls below. The player will float at the top of the webpage and display the following: -the song title, -download button -volume control -seek bar for current track. Pages and posts must transition via ajax so the song does not stop when browsing other pages. -keyboard shortcuts (let us know how difficult this will be to implement) -automatic next track (next mp3 link on page) We will also need post custom fields done so we can easily integrate tracks into Wordpress posts. See samples below: [login to view URL] [login to view URL] [login to view URL] Below is a software package that some blogs use to achieve the above: [login to view URL] Please send us a sample link in your bid if you have done something similar before. Thanks and happy bidding!