I would think that the upgrade would attenuate the differences, no?
Hey, i'm no head-fi genius either but what I did learn this year:
Audirvana+ is software for playing music on the Mac.
It is not an EQ program.
A+ does not do any up-sampling by default, although it can if you wish.
A+ over rides the poor aspects of OS X Core Audio which can be subject to rounding errors and other gunk
A+ loads an entire song into memory, can disable other computer "background" operations such as backups, etc to maximize cpu cycles spent on the audio.
A+ uses more advanced sample rate converters.
I don't use it's AU filters or other advanced tweak out settings, which might take the stream more away from "bit perfect".
all these details are easily found on their web site. or go read some computer audiophile threads on this software gem.
I have found no coloration or major tonal changes on treble, bass or mids.
simply clearer, more sound stage, more instrument separation.
some people have said A+ can make a good DAC sound great, a great DAC sound killer.
while some can not hear a difference between Audirvana, Amarra, Bitperfect and plain iTunes.
to each his own.
Analog Uber upgrade made my LCD-2s sound even better - a bit more treble and a little more air, however made my HE-400 sounding less pleasant and more difficult to listen - due to accentuated highs:(
Same here - Bifrost Uber / USB Gen2 fed from a Win 7 PC
Creative Labs Soundblaster Audigy 2 ZS for the toslink / coax passthrough and mobo USB header for the rest
I'm taking the plunge and getting myself a Schiit Bifrost with the Uber Analog Upgrade. However I will be using it through USB and the one I'm buying has the 1st gen USB. Is that a dealbreaker? What are the differences between gen1 and gen2? Does gen1 have USB 2.0? The owner tested it out for me and he connected it via USB 1.1. Obviously I don't want that
Thanks in advance!
EDIT: Had contact with Schiit so I know all the information I need now!
I have a question regarding the compatibility of Bifrost with 24/176. I am trying to play Explorations of Space and Time from foobar2000, which is encoded at this quality, through USB. For some reason, it keeps saying: "Unrecoverable playback error: Unsupported stream format: 176400 Hz / 24-bit / 2 channels".
Does this mean Bifrost cant handle 24/176? This is completely contradictory to having just read that it has no problem with this particular sample rate.
EDIT: Sorry, I just realized I posted in this thread. I have done no upgrades to my Bifrost. Sorry to post off topic.