Need help sound!

I am making a nature place and I wanted to put a waterfall sound inside the waterfall. I tried putting the sound inside a part and looped it(Played it also).It didn't make any sound. I was trying to make the waterfall getting louder when I get close to it. Please help me. Thank you.

First you would insert a sound into the brick you want the sound to be played from and adjust the volume, then in the SounId property of the sound you would type http://www.roblox.com/asset/?id=(and then the ID of the sound, without the brackets), you then set the sound on looped and finally you put a script inside the sound with the following written inside of it.

script.Parent:play()

And then just disable the script and enable it for the changes to take effect and voila, your sound now plays c: