I also recently learned that WASAPI and ASIO are not only non-standard, but are sub-par audio engine implementations. From what I'm finding, Linux (and therefore Android) uses a much more robust audio conversion engine, and therefore has the potential for much better sound. If you do a bit of Googling on ALSA and AudioFlinger, you can learn more.
Here is an interesting little blurb from this page..../
http://geeknizer.com/complete-guide-to-android-smartphone-audiophile/
"Android is Linux at heart, it uses modified Linux Kernel optimized for battery and memory. The app runtime lives in a highly optimized Java Virtual machine called Dalvik VM, advent of mastermind Andy Rubin and his team.
Linux uses ALSA, the most advanced sound engine every made by humans. Its not just advanced in terms of features, but also the best sounding. We cannot tell you how much better it is than the Windows Direct sound architecture found in Windows 7, 8, etc. Even with windows audio mods like ASIO4all, JACK, you simply cannot match the bit-perfect quality from ALSA system found on Linux.
We had been running Linux PC as our Audiophile system for a year now, and it simply beats every other OS ever built when it comes to bit-perfect audio. When we first made this move, we were couldn’t believe our ears, it was miles apart from Windows."