Hi,

There are a couple of ways you can do this.  The fastest and easiest is to go the the effects tab, click audio effects then presets.  There are about 60 effects there that you can drag and drop on top of the audio track to simulate different environments.  If you don't like any of them, you can go to the general section under audio effects, and try adjusting the controls there.  Finally if you still can't get wat you want,open the mixer, on the audio track that you want to adjust, click the "FX" button at the top of the track the audio effects rack will open, now you can adjust the equilizer, reverb, and audio compression.  With these three modules you should be able to simulate pretty much any environment you want, just be sure to use the little power button on the top left hand corner of each module to turn it on before you do any adjustments.  When finished don't forget to click "OK"

Good Luck