So I've owned my Xonar U7 for a week now. Nice little thing, but...I've noticed a bit of an issue surface today. I was using it to output 192 KHz sample rate at 24 bits for the past week and just today, I've detected some low buzzing noises periodically from my headphones. At first I was worried it was the headphones themselves, but I quickly switched to another pair and they did the same exact thing. Rules out the headphones being an issue. I checked onboard sound and that was fine by itself. It was coming back to the U7. I did some basic trouble shooting, including reinstalling the drivers (not sure if they properly uninstalled in the first place or not, I'm willing to attempt that fix again) and eventually, as it turns out, the buzzing is caused by the sample rate and bit settings I've been using for the past week. I reset the settings to default and everything is fine now. No more buzzing.
I have to wonder, does it really make a noticeable difference in music and games if I crank those settings up to the highest values? Should I just get the U7 replaced since it's still only a week old? Is there a fix I could do on my end? Help me out here. If you need more info, I use Sennheiser HD 598 headphones with this DAC and amp.
Update: The buzzing is back on the lower settings now. I'm really at a loss on what to do here. Any suggestions?