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Noisy Sound Card, Would DAC Help? - Page 4

post #31 of 45
Quote:
Originally Posted by bumblebee1980 View Post

I would forget the sub and buy the Focusrite Scarlett. it's got a 24/96 DAC, pre-amp, headphone amplifier with separate volume control, balanced 1/4" out.

http://www.amazon.com/Focusrite-2i2-USB-Recording-Interface/dp/B005OZE9SA/ref=sr_1_1?s=musical-instruments&ie=UTF8&qid=1359618523&sr=1-1&keywords=focusrite+scarlett

Random question, can you use those as an all-in-one for mic preamp and line out playback of normal audio simultaneously?
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post #32 of 45
Thread Starter 
Quote:
Originally Posted by DrGroove View Post

Why are you buying both?

Also, splitting the RCA signal to the monitors and a sub won't reduce sound quality, so don't worry about that.

Buying both because onboard audio on mobo is dead and want optical cable to make sure there is no noise. Was thinking about usb DAC but optical cable to DAC should be safer to ensure noise is gone.
post #33 of 45
Quote:
Originally Posted by DrGroove View Post

Random question, can you use those as an all-in-one for mic preamp and line out playback of normal audio simultaneously?

you mean listen to music while your recording something? you probably can but you wouldn't want to because your microphone would pick up the active monitors. you can record with a microphone while you overdub with headphones or active monitors at same time.
Edited by bumblebee1980 - 2/1/13 at 7:08am
    
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post #34 of 45
you can eliminate USB noise (if you even experience any) with a flat USB cable like a Wireworld or galvanic isolation. balanced 1/4" TRS has no noise vs. unbalanced RCA. USB is the future so I would get comfortable using it.

there is nothing wrong with buying a subwoofer later on. I had a $9000 home theater that took me a year to build.
    
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post #35 of 45
Thread Starter 
Ok so I'm really frustrated and confused right now and have no idea what to do. I got everything in (part wise) and I'll walk you through the steps of everything Ive tried.

1) Got the Asus Xonar DGX. Tried connecting my 3.5mm to rca Y adapter from soundcard to speakers. Was still getting buzzing feedback which was expected.

2) Plugged same Y adapter from the line out of the FiiO D3 DAC to speakers. DAC was powered by usb plugged into computer. Still get buzzing.

3) Plugged DAC usb power connecter into wall directly with Y adapter plugged into speakers. No buzzing, was relieved and thought I finally had my solution.

4) Plugged in my optical cable from soundcard into DAC, then line out Y adapter from DAC to 1 speaker. NO BUZZING

5) Plugged in both speakers with same setup as #4 and now both are buzzing again.

So why am I buzzing when I have both speakers plugged in but get none when its only one speakers or the other. I tried connecting one speaker with rca and the other with line out from the DAC as well. Still didnt help. Also tried plugging 1 into the DAC and 1 into the soundcard, still buzzing.

Anyone have any suggestions, or know why this is happening? Again, when both speakers are plugged into my netbook they work fine with no buzzing.
post #36 of 45
So with setup number three the noise was completely gone from both speakers? Did you try plugging in different speakers or headphones into the soundcard?

Could be a grounding issue or something is introducing EMI/RFI. Are the RCA cables shielded? I find this all very strange.
    
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post #37 of 45
Thread Starter 
Sorry, with #3 it was still just testing with one speaker, not both.

Tried plugging headphones into the DAC with the line out and they work fine.

No idea if the Y adapter is shielded, but again worked fine with my netbook.

Its definitely something to do with these speakers. I just find it strange that they work fine when its one or the other plugged in, or if they are used together with my netbook. My best bet is that its something to do with the rca connection and them being hooked up to an unbalanced source. Idk though, certainly no expert. Guy I bought them from demoed with TRS cables.
post #38 of 45
Thread Starter 
Ok I noticed something else interesting. If you notice the two nobs on the speakers, if the set the volume to a very low level, about -25dB I no longer get the feedback. I then max out the volume in my xonar control panel and it plays fairly loud with no feedback/buzzing.

post #39 of 45
Sometimes speakers will buzz due to the output voltage of the source and sensitivity mismatching. It happened with my XtremeMusic. At about half volume my speakers would have a discernible hum.
    
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post #40 of 45
Quote:
Originally Posted by MistaDowner View Post

Sorry, with #3 it was still just testing with one speaker, not both.

Tried plugging headphones into the DAC with the line out and they work fine.

No idea if the Y adapter is shielded, but again worked fine with my netbook.

Its definitely something to do with these speakers. I just find it strange that they work fine when its one or the other plugged in, or if they are used together with my netbook. My best bet is that its something to do with the rca connection and them being hooked up to an unbalanced source. Idk though, certainly no expert. Guy I bought them from demoed with TRS cables.

what kind of RCA interconnects are they? why are you splitting the 3.5mm output on the Fiio D3?

if the speakers don't hum or buzz when no source is plugged in. return everything you bought and get a DAC with balanced outputs and some balanced cables.
Edited by bumblebee1980 - 2/4/13 at 8:14pm
    
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