Audio Testing

I had all sorts of issues testing audio on this board. There is some sort of weird glitch on the input line of my particular board that results in increased input when line volume is increased to more than 55%. I tried all sorts of combinations in settings to get a better result out of this board, including playing with the recording and playback volumes and resolutions, but it was all to no avail. This happens from time to time with some board products, and it has been boards like these that had ASRock say they'd do better, and here they haven't. To be completely honest, it actually seems like some sort of assembly issue rather than a design fault to me since the actual audio circuit seems very similar to what the other ASRock X299 boards I have tested already have, and those other boards produced great results. To my ears, the playback was fine, so I have to put this poor result in testing down to being a one-off issue. ASRock will investigate on their own to see what's going on as well, and in the end, it is very likely I'll send this board back to them so they can analyze the problem as they have done in the past. It is running into these issues and how they deal with them that really has me have such confidence in ASRock in the first place. I will update this section should ASRock fix or verify the problem. RMAA results are below:

RightMark Audio Analyzer