How to play 5.1 audio direct to speakers?

I have an audio file recorded in 5.1 surround sound. I'd like to play this from my Android Device. The issue I have is the various Android devices I have (tablets/phones) all contain the standard 3.5mm jack, which I *think* means stereo only! I'm not after a simulated surround sound, I need access to the outputs! Maybe it's possible via the USB? My exact requirement (if it helps) is to end up with 4 outputs. Front-left and front-right as a stereo pair and back-left and back-right as a stereo pair (I don't need the sub-channel). However, being able to somehow split the signal so each goes to its own speaker is also fine, I can worry about the rest. The focus is on how the Android device can provide this signal(s). The device I want to connect to is [External Sound Card With USB 5.1](https://web.archive.org/web/20161012014903/http://www.myxlshop.co.uk/j-s-external-sound-card-with-usb-51.html) (note it's USB input). Maybe with the new USB DAC input?