I found out what the problem was! I have all my programs installed on a Creation Station Computer manufactured by Sweetwater. Apparently (even though it is a dedicated music computer) there is an inherent compression on the audio output of the PC itself. This is not the case when running ProTools through my digital interface. That’s why it was only apparent in Wavelab and then upon playback of the burned CD. Both were running through the sound output of the computer. Just discovered this last night…but at least I can now send my master out. Thank you to everyone for your help. I’ll be contacting Sweetwater today to inform them of this problem.