To everyone out there that thinks it is “cool” or “neat” to put music on your website, do the rest of us a favor, and don’t. While I understand the aesthetic nature of some sound, for the most part it is just annoying. When online, I usually listen to iTunes, and the last thing I want is some hideously encoded streaming .wav file repeating the same 6 seconds of music over and over again. Unless I really need to be on your website, I hit back on my mouse and try to immediately start repressing the memory that is your website.
At the end of the day, music requires a lot of bandwidth for those of you hosting the music files, a lot more than even a complex page (assuming your images are optimized, but don’t get me started on that today). And for every Pro:fx out there, there are a 100 Hampsterdance websites.
If you aren’t an amazing DJ, or awesome Flash/Shockwave/Silverlight developer, do us all a favor, and leave the music off your website. I like my thousands of MP3‘s, and I don’t force you to listen to them.