Fewer kernel calls between hardware and software for loerw latency processing of audio is a must, there is a minimum amount of latency you can have with audio for anyone performing and that’s debated by a total round trip time frame. From the second someone plays a note on say a guitar to the moment the resulting sound comes out of their speakers and into their ears is rather critical for timing.

Trouble is to do most anything with digital audio you require a buffer (here we add more latency) so that we can do the things we need to. Your audio device will have it’s own buffer (and in the case of ALSA and Linux) your operating system will implement what’s considered an audio “server” which will add is own buffer to route to whatever you are thinking you need to do and blah blah so on so forth. HAL drivers like ASIO mean you have much higher stability and much lower latency as you now have fewer buffers which is less added latency, fewer interruptus to deal with, and everything just kinda works in harmony. If you want to learn more consider first learning what ALSA is or any of the terms I originally used. I suggested starting with the wiki page where all of this is already explained

This got me curious what these acronyms were. I found this information interesting.

https://hal.science/hal-03116888/document