Check that link that Riverlethe left (http://www.mixonline.com/recording/mixing/audio_emperors_new_sampling/)
This sort of testing has been done on a large scale. That's why I was so interested in your result. If you can consistently identify the differences using different samples - then your results are important. But it would have to be redone with independent verification (which is why I suggested contacting Ethan). At the very least - contact him. I'd imagine he would be interested .......
When was the last time you tested?
I glanced at the testing method in the article. There are bunch of test conditions that seem different. For one,
- Using headphone set up (Centrance DACMini -> Beyer T1) rather than speakers
- Exactly same analog chain in all cases rather than switching different D/As
I must have done this around last October or so.
By the way, I don't have hearing that of a dog. These days my "bandwidth" rolls off just shy of 17.5KHz when subjected to sines, including this headphone setup.