Xonar DX not performing as well as it should

hans030390

Diamond Member
Feb 3, 2005
7,326
2
76
I just recently purchased a Xonar DX. I was really excited about it, as all of the reviews for it were extremely good. However, when I hooked it up, something just sounded off compared to my onboard ALC888 and X-Fi Titanium (which I recently sold so I could get the DX).

So, I started up RightMark to test it out. I had to turn the volume down to 50, because otherwise there was tons of noise and such even with the mic in turned way down (it wouldn't let me test it). This is strange considering the X-Fi worked at any volume setting. Once I was able to get everything set up, I ran the tests. The results came out better than onboard, but fell short compared to the results everyone else gets for it. Even the X-Fi did better (except in frequency response, though the left and right channels are a bit separated for some reason).

Naturally, I'm a bit disappointed. What might be causing this, and what should I do about it?

Update: I was doing more comparisons between my RightMark results and reviewers online. My results are closer than I thought when you directly compare the graphs. For example, the noise graph on mine closely resembles those seen online. However, if you follow the graph from the high to low frequencies, the results get worse the lower the frequency gets. Usually around 100hz you'll see a pretty big incline as you go towards lower frequencies. This is what's throwing my numbers off compared to others, as their graphs are usually pretty linear across the frequency spectrum.

Hopefully this extra info helps!
 
Last edited:

Rifter

Lifer
Oct 9, 1999
11,522
751
126
I've been doing alot of reasearch into computer audio over on head-fi and they have told me the power supply can play a very large role in clean sound. What PS are you running? Apparantly you can have a Xonar STX but if you have a high ripple low quality PS it will still sound like crap.
 

PurdueRy

Lifer
Nov 12, 2004
13,837
4
0
I don't see why the line in on my card would suck considering everyone else gets much better results with it than I currently am.

If you are bringing it into the mic in make sure that the windows option for a +20dB boost on the mic line is turned off. That would explain the noise and lower volumes necessary.
 

hans030390

Diamond Member
Feb 3, 2005
7,326
2
76
If you are bringing it into the mic in make sure that the windows option for a +20dB boost on the mic line is turned off. That would explain the noise and lower volumes necessary.

Yeah, I had that boost turned off.
 

hans030390

Diamond Member
Feb 3, 2005
7,326
2
76
Maybe it's an issue with my motherboard? I recall having similar results with my X-Fi, now that I think about it. At the time I figured it was normal considering the RMAA numbers matched up with what I was seeing online. They're using the same PCI-E slot, so maybe there's something causing problems there?

I'm wondering if swapping it with a Xonar D1 would solve it, since I could move it to a PCI slot. My PCI slots are further from CPU area of the motherboard, which is a dense area of electrical components...I could see that causing issues. Sadly I only have one slot to put the DX in, and it's the top most PCI-E slot...

I'm still hoping my PSU is decent enough to not be the cause of this.
 

hans030390

Diamond Member
Feb 3, 2005
7,326
2
76
Well, I figured out the problem. It was certainly silly! I had it set up to use Mic-In instead of Line-In. I was doing a bit of research online and finally found some info on it (I was prompted to do this by someone on Head-Fi). After switching that, my results look great!