hey James - follow this.... a few VEEEERY simple steps to Freedom!!!
- set the audio level that you wish to use on (say) the first audio clip in your timeline.....
- right click (or whatever other technique you use) and copy the audio clip......
(you could follow Edit -> Copy)
- highlight ALL other audio clips in the timeline that you'd like to effect.....
- right click and this time select "paste attributes"......
(or Edit -> Paste Attributes)
this brings up an options box of which particular attributes you'd like to paste.....
in this case we're gonna use the obvious one... "levels"........
VOILA!!!!
Enjoy and good luck
Chris