First, dump the period on the url of your link.
Now, on to the subject at hand,,,
I know *people* who regularly sample sounds from various sources for use on the web (ie. MP3s, CDs, stuff they record in everyday life on a low-end recorder and even some who have ripped off mother nature -- see:
http://www.engadget.com/entry/3745397085341518/
** NOTE : THERE ARE VERY STRICT GUIDELINES FOR USE OF COPYRIGHTED MATERIAL **
I STRONGLY URGE EVERYONE to abide by these laws. That said, a single note like in the url provided may / may not be clear for use.
ALWAYS check with a lawyer when there's a question.
And DON'T STEAL.