This was interesting. Using the link Eddie posted, I was able to hear sounds up to 4000-hz using headphones. Of course, I had to turn up the volume a bit, but the sound was very clear and audible.
Thanks for the link,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)