android 5.0/5.1 and (possibly) every rom based on that version have problems detecting and running external dacs through usb port. at least natively.
as now, the only 2 apps that works are UAPP and Onkyo player. I tested with iBasso MK2 dac/amp and OnePlus One 64gb.
I tried also Neutron, Poweramp, GMusic, Shuttle+ and several others: the DO NOT work now. I think we have to wait or use the above-mentioned apps.
I have to say I dont like their GUI (the one i like most is poweramp). But the software is really good and the audio part is spectacular
HiFime has refered on his website that the 9018 DAC works natively with a Nexus 6. They told me today that their HiFime UH1 384Khz USB DAC, headphone amplifier and I2S/DSD interface works also natively from a Nexus 6. That makes sense since Lollipop now implements USB Audio Class 1 natively.
So, I have a Oneplus One too. I'm expecting that the 9018 DAC will also work natively when the release of CM12S. I expect that the same USB DACs that work on the Nexus 6 will work on CM12. Shouldn't I expect this?
Are you using a CM12 nightly on your 1+1? Just tested with MK2 or know anything more about DACs working on CM12?