[jjd-uk]

Ok I think that confirms my suspicion that either the Shield or Android doesn't handle Quad correctly, probably because it's not a mainstream format. Sounds like MRMC and SPMC have workarounds maybe because it's an issue on lots of Android devices. Not sure if we can do the same for Android only as you probably wouldn't want Quad sent as 4 active channels with 2 passive in a 5.1 layout on Linux, Windows etc which are likely able to handle it.