Well, I returned settings to factory default. Did not help because it appears that the songs were saved with their volumes all the way down to zero. Don't know how that could be because the sounded great before I saved them.

What has me perplexed is that I had a default mix already set up and saved (right click on combo and select save current mix as default). When I try to load the default mix, all of those volumes are set to zero. Apparently my default mix file is hosed up.

What I will do is find all the songs that is having the volume issues - reset their mix settings (vol / pan) and SAVE the file again.

Thank you Matt for (believe it or not) pointing me in the right direction.

Mark