You can also search for some "best demo CDs" threads and get a couple to see if how your system sounds playing ones that most agree are well recorded.
Another source is the dynamic range database
http://dr.loudness-war.info/
This database works under the assumption that CDs with a wider dynamic range sound better. While generally absolutely true, mastering and other factors also contribute to the overall sound quality.
You can also experiment by playing high rez recordings thru the usb inputs to the Oppo, if that model has them(the 105D I owned did). Many find that files played sound better than the same music via a spinning mechanical disc. You can rip from CD to digital with free XLD on mac or dbpoweramp on PC. With lossless file format rip(WAV, AIFF, FLAC, etc) the same music sounds better to my ears. That is the first step away from CDs entirely, but that's a WHOLE 'NOTHER conversation...cheers,
Spencer
Another source is the dynamic range database
http://dr.loudness-war.info/
This database works under the assumption that CDs with a wider dynamic range sound better. While generally absolutely true, mastering and other factors also contribute to the overall sound quality.
You can also experiment by playing high rez recordings thru the usb inputs to the Oppo, if that model has them(the 105D I owned did). Many find that files played sound better than the same music via a spinning mechanical disc. You can rip from CD to digital with free XLD on mac or dbpoweramp on PC. With lossless file format rip(WAV, AIFF, FLAC, etc) the same music sounds better to my ears. That is the first step away from CDs entirely, but that's a WHOLE 'NOTHER conversation...cheers,
Spencer