Most (90%+) are truly hirez sources (or analog tapes). We have a whole thread on HiRez Circle to report "faux" hirez. 
teb_b:
I went over to the HiRez Circle, downloaded a few of the hi-rez samples from the sites that are linked, reset audio midi setup on my iMac to 24/96, and played some hi-rez FLAC tracks with Play through my hi-rez AVA Vision DAC. The music was great. Very detailed. Thanks.
1 INTHEPIPE
