This beautifully simple Flash tool provides you with four audio channels. You populate each channel with a looping sample that you can choose from a vast palette. You've got sounds of whales, the beach, fire crackling, crickets, a heartbeat, drums thumping in the distance, etc. The palette is extensive.There are four different patterns that you can select for each channel, or you can have the sound periodically fade out and start up again.
http://naturesoundsfor.me/Whales_and_stuff
http://naturesoundsfor.me/Whales_and_stuff