Okay guys, I have some pretty exciting news to share: it looks like there's a way to share external hard drives with an Android device and have the files stored on the hard drive play through USBPP and output to a USB DAC!!! I just got it working and wanted to share! (If someone has already done this before, then please excuse my excitement-- but this seems to me to be a method of getting access to vast quantities of music at high quality while on the go, and unless I've missed it this hasn't been accomplished yet).
Current Setup: FLAC files on a WD 1TB external HD >>[standard USB]>> Ravpower FileHub >>[WiFi connection]>> Nexus 7 Tablet (USBPP & MobileFun) >>[micro-to-mini USB OTG cable]>> iBasso D-Zero DAC/amp >> ASG-2 IEMs
You can also use a portable USB hub and a USB memory stick. I tested this today with an old 2-port hub, Dragonfly, and a 16GB Kingston stick. I tested the power consumption during 7 hours, at home and on a cartrip, and found that it consumes about 250-300mAh (overall power consumption with screen mostly off and no SIM - only WiFi when at home. A larger USB stick might consume more. Whether you can live with this power consumption is dependent on your battery size and how long you want to listen without a need to charge.
Edited by Xp-Audio - 2/22/14 at 9:17am