Thanks, Eli. I suspect there's something in the source audio files that SampleTank doesn't like. I have never had any problems importing from other sampler formats (even from EXS24, which can really boost the quality of some programs when STRETCH is in use), only in building my own. But for the life of me, I can't understand how something could stump SampleTank causing defective instruments when I have exported from two different audio editors on two different computers with the same results. As I mentioned to D-Flo, I'll give this another try very soon and get back to him. I am very moved by his commitment to address the problem. I anticipate the same issue will occur, but maybe this time IK can get to the bottom of it with D-Flo's blessing. Frankly, I was waiting for a minor update to the software that might fix it, but it hasn't been updated since before I noticed the issue.