Great, just wanted to make sure before pulling the trigger! I've been (very occasionally, I admit) using the Cubase code since long before Sonar; I got hooked by one of the early minimal-function versions, and the reasonable loyal-customer upgrade prices kept me following along. At this point I have a DAW setup that *FAR* exceeds my current needs -- heck, Platinum did that by itself -- and my skills in using it, but I hope to dive in deeper now that I'm retired. Most of my experience is actually small-stage live sound, largely folk and folk-adjacent styles, but I'm starting to learn mastering.
Re the problem: I've never had a problem importing audio into a project before. And I'm really surprised since these are stereo .wav files, which should be absolutely vanilla bytestreams. They're output from a Mac copy of Audacity, which the performer used for recording and a bit of initial mixing. I can play the using just about any other Windows audio app I've tried, But when I open a Basic project and import these files, it's as if every other sample was zeroed. Only thing that has occurred to me is that upsampling might have malfunctioned, but so far I can't imagine why.
I'll reboot, try it one more time, and if it still fails I'll post images and/or clips.