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192 kHz DAC Out ----> Analog Mixer ----> 192 kHz DAC In

post #1 of 4
Thread Starter 
I don't understand audio all that well so I was wondering if you guys could help me get the most out of my setup. I stream gameplay/music online via a 2 PC setup with a mixer between the two. Basically I game on one and use the other to do the compressing/streaming. The audio is sent from the gaming pc to the mixer where it is combined with a mic and then sent to the streaming pc. Both PCs have Xonar Essence STX sound cards in them capable of 192 kHz input/output. The issue is that my analog mixer (Mackie 802-VLZ3) has a frequency response range of 20Hz - 50kHz. Is it pointless for me to set those sound cards to 192 kHz when my mixer is incapable of input/output at the same frequency?
Edited by unph4zed - 6/26/13 at 12:33pm
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post #2 of 4
Uh...

First of all, your Xonar has a SAMPLING RATE of 192Khz, NOT a frequency reponse of 192Khz. Maximum frequency is half the the sampling rate, so 96 Khz.

There is no human on earth that hear at 50Khz, so worrying about frequency response above (or anywhere near) that is completely pointless. In fact, if you were to send a frequency that high to your speakers or headphones, they'd likely fail or just make tons of noise.

So you're worried about the quality that 192Khz gives you... But analog mixers don't have sample rates, whether its in the loop doesn't matter in that regard.

But 192Khz is completely pointless, because your audio source isn't that high a sample rate, and your output (mp3 or whatever) isn't going to be either.
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post #3 of 4
Thread Starter 
Thanks for the explanation. Like I said, I'm still learning a lot on the audio side of things so excuse my ignorance.

Do you think it would be worth trying to keep the audio digital? Unfortunately I can't use HDMI because I need to split a 120hz signal to my capture card/monitor. I've been looking into spdif, asynchronous usb, and i2s with a digital interface but there doesn't seem to be that many people applying it in this way. The other issue is bringing a XLR RE20 mic into the picture and having everything play nice with Windows 7.
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X79 Tri-Sli Gamer
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post #4 of 4
The only thing that staying digital helps with is noise... Do you hear more noise with your mixer in the setup? If no, then don't worry about it. If you do, you just need to find a soundcard that has SP/DIF in and use that to transfer audio between the two. You'd then use the Mackie just for the mike, and mix using software. But that's a lot of screwing around for little gain- especially since, with your setup, all your levels are right there on the mixer, ready for tweaking.

What you are describing is basically what I do with an ancient Mackie 1202 mixer, but I only use 1 computer. Its fine.
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