Audio Testing
ASRock has its audio circuit design perfected in such a way that the need to buy a separate audio card is questionable these days. If you are the sort to swap OPAMPs or need a specific connector that is another story, yet when it comes to pure audio reproduction, you can trust ASRock's current-generation onboard audio designs to work extremely well. Function-wise, a bit more work could be done by ASRock, I feel, but that's a personal thing that will change depending on how you use your PC and is, as such, a matter of personal preference.
RMAA results are below. Considering everything, this is one excellent result:
RightMark Audio Analyzer