well i cant comment on the post here but i did have one experience when i though maybe some of my gear was not working correctly.

i was listening to Sarah Mclaughlan "angel" and at the end of the song when the piano is playing i could hear some distortion, being that this disc is supposed to be well recorded i thought it was my speakers or something.. listen on my grado's and heard it again. Its the CD! what a silly mistake!

Haoleb's Audio/DIY Website