There seems to be quite a lot of website creators who think it is cool to have music automatically play when you visit their site. Personally, I find that irritating. I often listen to music while I'm browsing, so having another unexpected music track suddenly assault my eardrums on top of what I'm already listening to can be quite jarring.
If you must have music play automatically on your website, at the very least provide a prominent "off" switch so that your visitors can choose to listen or not to listen according to their preference.
Frankly, if I visit a site that plays music without me requesting it to do so, I'm app to hit the "back" button and never return.