DUAL PC stream audio setup, need help

mcspadden

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May 22, 2015
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ok so i have two pcs for streaming and video is fine but audio is fucked lol, im using OBS to get it to twitch also. I have a behringer xenyx302USB mixer and i have my streaming mic plugged into that in the xlr spot on the mixer. in the line spot(directly to the right of the xlr input) i have the audio which is 3.5mm split into red and white (no mic) coming from my gaming PC(this is for game sound), the line is set to line in and it goes out to main mix (i have nothing plugged in there?). so directly right of line i have 2 track which is 3.mm to red and white from my streaming PC(so i can use my stream mic to use teamspeak etc andn this cable is to listen to what sound is coming from my streaming pc), the problem is i can only here one PC in my headset at once, if i click the red button on line/usb down i can hear the streaming pc but if i leave it up i can hear gaming PC. here is how im connected and i need major help bc i literally have no idea what im doing with audio lol https://gyazo.com/46355568f1e0b5c573951dd2539c2cdf
 
Solution
I never used your mixer but I read the manual, and looked into it.

What I'm guessing that it does is mix the Line Input with the 2 track Input. The line input can be switched between the RCA inputs or the USB input. Therefore you have either:

- RCA Line Input + 2 Track RCA Input or
- USB Input + 2 track RCA Input

You mentioned that when hitting the red button you can hear the game PC or stream PC. This is because the Game PC is connect to the RCA Line input, and the stream PC is connected via USB. Your switching between these 2. The connection to the 2 track input from the stream PC is doing absolutely nothing since the stream PC is outputting audio via the USB. You need to set windows to output sound to either your...

gondo

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I never used your mixer but I read the manual, and looked into it.

What I'm guessing that it does is mix the Line Input with the 2 track Input. The line input can be switched between the RCA inputs or the USB input. Therefore you have either:

- RCA Line Input + 2 Track RCA Input or
- USB Input + 2 track RCA Input

You mentioned that when hitting the red button you can hear the game PC or stream PC. This is because the Game PC is connect to the RCA Line input, and the stream PC is connected via USB. Your switching between these 2. The connection to the 2 track input from the stream PC is doing absolutely nothing since the stream PC is outputting audio via the USB. You need to set windows to output sound to either your soundcard/onboard sound or USB. Do this in control panel under sound.

Now here is what to do. Disconnect the game PC for now. Hook the USB to the stream pc (required to get the input form the mic). Connect the soundcard to the RCA line inputs. Now switch between the 2 using the red switch. It will only work on USB for now, so switch windows to output to USB and Soundcard as you hit the red button. Listen to the difference and determine which sounds better. I'm guessing the USB will sound better and be quieter with less hiss since your suing the Behringer DAC with digital input. While you rin control panel under sound you can check under recording device to make sure your mic is set to USB which is probably already is.

Ok, so lets say you determine USB is the best. Disconnect the RCA cables and set the red switch to USB. If you prefer the RCA connection leave it connection, set windows to output via soundcard not USB, and set the red switch so you hear from the RCA. The USB must remain installed for power, and to get the mic signal to your computer.

Now connect the game computer to the 2 track. It'll mix with either the USB or the RCA Line input from the stream computer, whichever you determined sounds better.

The problem you have now is the game computer is connected to the line input. Your stream computer is outputting via USB. You cannot mix Line In + USB. Only switch between the 2. You need to move the game computer over to Track 2, and set to USB to mix the 2 and eliminate the RCA from the stream computer. Or plug the RCA from stream to Line In if you determine it sounds better and set windows to output via the soundcard.

Windows cannot output to 2 devices simultaneously.

It's hard to explain without writing a lot, but I hope you can follow along. If you have any questions feel free to ask. Also make sure both buttons are set to send to headphones so you hear both computers and not just one. Once working mix the 2 computers to balance the levels to your liking.
 
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mcspadden

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May 22, 2015
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ok i'm going to try this out, thank u!!!! would it be better for me to just upgrade my mixer? it seems like this mixer is average at best lol.
 

gondo

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If it works for you why upgrade.

I never did streaming like you but is it really necessary to have a second computer for that? You can't multitask it while gaming on the same system? Just curious. I never used OBS so I know nothing about it.

If swapping mixers you would need something with the USB link to get the mic to your computer. You could always just get a USB PC mic like a Samson or Blue and forget the XLR mic with phantom power. That way you could use a regular mixer of better sound quality.

I wonder if there is a device available with dual DAC. Hook each computer with a USB and mix it to a single headphone amp. No mixer, no XLR mic. That would be perfect for you. I'm gonna go searching.
 

mcspadden

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May 22, 2015
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so do i only use the mixer for my XLR mic input? i think i have to use the mixer, if not, im not following you and i still havent tried to above because had very little time lately, i will try tomorrow
 

gondo

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In your case yes you need the Mixer for the XLR mic. You have no other choice. But instead of plugging both computers to the mixer, which works, you could take the line out of computer 1, put it to line in of computer 2 with your headphones. This required a 3.5mm male-male cable to connect both computers. You can try for fun and see how it sounds.

I bet the mixer will sound better because of the headphone amp. Also you may get audio through the USB on the streaming computer which could sound better using the better dac of the mixer.
 

mcspadden

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May 22, 2015
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your first method works great man, i just tested it out and its all good. Thanks for ur help and also i may try your simplier version too, because i do have wires EVERYWHERE haha
 

gondo

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Just of curiosity, from the streaming computer to the mixer, did you compare using the RCA cables from sound card vs using USB sound, and switching between the 2 in windows and on the mixer. I'm curious if you tried both and compared.
 

mcspadden

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May 22, 2015
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no i didnt, the USB sounds very well to me so i just went with it!
 

gondo

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I figured. USB will be very quiet without any hiss. Cheap analog audio (onboard sound) will give hiss. Higher end onboard sound or a soundcard will reduce this. External USB DACs are dead silent with no hiss. And the sound is as clear as can be, no coloring or alteration at all. It's jsut a DAC and nothing else. So I suspected your mixer would act similarly.

That's why I personally use a DAC and not a soundcard for my PC audio. It's also cheaper than a soundcard. To improve the sound I jsut use the EQ in my player, or Razer Surround for gaming. No fancy soundcard software to deal with for effects.

 

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