Quote:
Originally Posted by -X-
In the higher range, I always tend to get a headache because of the aliasing that is even worse when playing more notes.
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Sounds like listening fatigue. Often caused by digital reproduction of sound into a less than perfect audio chain and particularly with some monitors and headphones with metal tweeters/drive units with ave more of a tendency to resonate badly than the softer sounding silk or similar tweeters.
Distortion and/or aliasing in high frequencies certainly contributes to this by adding a whole load of extra atonal frequencies.