Hi, I want to improve Audio on my phone with an external DAC. But want to be sure that the DAC will work with my phone. Is there something to look for on my phone? Or some settings to change? Or does it require rooting ? (Which I barely understand)... I have heard that the "Stock Android" after 5.0 supports USB OTG Audio, but that some phone manufacturers don't allow full USB Audio, like volume control, etc. Thanks for any help ! My phone is an OPPO Find 7a; But was looking at some newer ones and want to know about those too. And the DAC I am considering is either a Dragonfly Black 1,5, or a ZuperDac. Thanks !