ASIO is for "high end" sound cards with 32 bits workstations, with support to Mac, Windows, Linux. low latency, high outputs without the interference from operating systems. By pass the PC OS for the most pure lossless sounds. One way to tell if your audio system is so called "hi-fi" is to check if you have ASIO. But it's painful, when Inputs as ASIO it can only be use by a single software at a time. And most windows "non-professional" software won't even detect it as it by pass the OS kernel. And Daily many common apps don't support ASIO like discord (who on earth spents thousands dollars audio on discord) And no, ASIO is not supported by audacity. Some times the best Audio set up is not the best for you.