Im sorry but what is cc mode?

Its a plug and play protocol. Just connect your phone into the ADI and it just works right away. You could plug a mouse and keyboard right into your phone.  https://www.sweetwater.com/insync/class-compliant/

You mean you get BitTest confirmation on ADI-2 for both PC and Android?
But still it sounds different for the exact same audiofile?

Otherwise (no BitTest confirmation) it might well be that Windows changes the sound, it‘s notorious for using low quality Sample Rate Conversion in default setups.
The resulting extra treble, in fact distortions, might sound like an “improvement” on superficial listening.
Only when listening closer the treble smearing becomes obvious.
Or it’s simply different loudness levels.

If feed with the same files I can’t hear the slightest difference between various sources, PC, iDevice, CD/DVD-Player, AppleTV, ... USB, AppleCCK-USB, SPDIF optical, coax.

ADI-2 eats it all in the same ultimate quality.

Audafreak,

Interesting.   Are you saying that you downloaded the RME Bit Test files to your Android, and when played via the RME, you received the big, white, "Bit Test Passed" confirmation screen?

If you didn't...we're only guessing here.  "Bit-Test" is unforgiving of even the slightest alteration of the data,  and if the bit test file data received by your RME does not precisely match the imbedded bit test Template...Bork!!  Nothing happens.  No White Screen of Success. There is no "Fail" Screen (It has to be done like this else every Song we played would have the RME Screaming "Fail"  because the Audio Data does not match the Test Template)

Ok..

Take another look at this!  Be certain you're actually PASSING the test...not merely "running" the test.

Bit Test is Cool!   

Curt

To give you an example, this is what a Bit Test Pass Screen looks like:

Well excuse me! Bought the app from recomendation in this forum. Works on Android...

Sad U couldnt make it work. Neutron is featured specked ++ and very capable. Lots of DSP functions.

I was talking about playback:
- PC via ASIO - no change in volume
- Android phone via direct USB outside mixer - USB Audio Player Pro, similar to Neutron, it has more functions like Tidal...
Both bitperfect and in case of DSD in native mode on Android DoP in Foobar. The same files, of course. From data content point of view no problem. But in case of Android not so clean sound.

There are lot of things which can affect playback, even different usb ports in the same pc - see page 61 in ADI2 DAC manual or page 113 in UCX2 manual. Also number of installed sw running in background, installed usb drivers for each port (which devices were already plugged in).
Especially in Android number of installed programs is important because many are running in background and I have lot of them - around user 300 software packages. Normal user has over 100. Some are sleeping, but all are hanged on different events like touch, display on, off, network on off, there are tens of such events which start lot of sw in background what you usually don't know. Most Android apps are very aggressive and selfish in taking CPU time.
Shortly said there is lot of sw running in background which user does not know about. If you switch on display then 8 cores processor is running 20-70 % for very long time.  Try for instance CPU Stats - you will see. This is how Android is designed - very different philosophy then Windows.
On PC there is not unusual that usb controller has not only available usb ports but also for instance integrated card reader, bluetooth transmitter maybe also others. How it is in Android I don't know but it wont be much better because of limited size.
Another chapter can be noise generated by the phone.
As a sw developer (35 years of developing of many different kind of applications including device drivers) I can imagine many problematic SW things.

But this is not what I wanted to talk about. Just wanted to share my own experience with my own PC and my Android phone.
Maybe on clean Windows installation and empty powerful Android phone situation is different but this is only laboratory case. Real world is usually different.

Yes, of course it was not blind test, I know arguments like this, I also use them sometimes. I just connected DAC to phone and sound was not as I was used to. So I played it via Foobar and it was again as I was used to.
I did some blind testing in the past but to say the truth after some time I was not able to distinguish anything - I forgot even what is my name.

So take it only as my personal feeling. Anybody can try with his own phone and have his own experience. I tried it with 3 different DACs with similar results - but I agree my bias can be against mobile phones. But idea "no difference" can be also bias.

Does anybody use some old cheap Android phone as quality music server/DLNA server/renderer for instance with another phone as a controller? It would be good replacement for special PCs with special USB cards.