He's using an AV Receiver--Digital Signal Processing (DSP), the exact process iFi avoids.
As I wrote previously,
I did the tests on four different amplifiers:
AM Audio (with Pre Lector ZOE), Graaf (with Pre Lector ZOE), Onkyo (integrated) and the my Sony,
and in all tests the sound came from iDSD, compared to that of my poor and old DVD player,
was that of a "good mp3 files", compared to the "excellent LPCM 44.100khz" reproduced from the DVD player,
in a nutshell
a digital sound flat and backlog vs a deep sound, round and present
unfortunately my language is not English,
and to me remains difficult use the correct terms, to explain what I heard
all tests, always carried out with this CD of Chesky Records, I use for over twenty years,
http://www.amazon.com/Vivaldi-The-Four-Seasons-Antonio/dp/B000003GDQ
tried in time, on any type of audio equipment,from millionaires (with EMMLabs, Audio Research, Conrad Jhonson, AM Audio, ecc..) to economic,
and so I know to perfection every little nuance of this CD,
every detail of each instrument, and the location of each instrument
Definitely with the replacement of the new iDSD things will change
Sorry for my bad English