Yes, the Audyssey only works with HDMI. I'm keen to preserve the DSD resolution as long as possible without downsampling to PCM, which is what the Audyssey does. Perhaps the people who praise the analog outs only listen to it in stereo.
Oppo 105 Analog vs HDMI?
I listen entirely to classical music, and when I listen via the the Oppo 105's multi-channel analog outs (I use the main stereo LT/RT for the front channels), the sound is rather boxy/congested and has little depth. Via HDMI, the sound just blooms! The imaging is far wider, deeper, and the sound is simply more open sounding. I find this to be very puzzling since the analog section of the 105 is so highly touted. I do prefer the m-ch outs for solo instruments since there is less of a sense of depth in the first place. Any suggestions?
(Here is my system):
DALI Epicon 2 front speakers
Martin Logan Motif center speaker
Definitive Technology ProMonitor 1000 surrounds
Martin-Logan Abyss subwoofer
Sony 5400ES SACD
Oppo BDP 105 SACD/Blu-ray player
Marantz 8801 pre/pro
Parasound Halo A51 5-ch amp
(Here is my system):
DALI Epicon 2 front speakers
Martin Logan Motif center speaker
Definitive Technology ProMonitor 1000 surrounds
Martin-Logan Abyss subwoofer
Sony 5400ES SACD
Oppo BDP 105 SACD/Blu-ray player
Marantz 8801 pre/pro
Parasound Halo A51 5-ch amp