Computer-to-receiver hum
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Joined: Nov 2003
Posts: 74
old hand
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OP
old hand
Joined: Nov 2003
Posts: 74 |
I have hooked up my computer to my a/v receiver and I get an annoying hum coming from the receiver/speakers. I've connected my Creative Audigy2 soundcard line-1 out port with a 1/8" stereo phone jack to an RCA cable, then a Y-splitter, to my Onkyo TX-DS595 tape ports. I get the hum even if I'm listening to another source (other than the PC/tape). Setting the PC audio out volume to any setting doesn't help. Any ideas?
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Re: Computer-to-receiver hum
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Joined: Feb 2005
Posts: 5,211
axiomite
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axiomite
Joined: Feb 2005
Posts: 5,211 |
Sounds like some sort of a ground hum problem maybe?
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Re: Computer-to-receiver hum
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Joined: Jan 2004
Posts: 13,848 Likes: 14
shareholder in the making
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shareholder in the making
Joined: Jan 2004
Posts: 13,848 Likes: 14 |
The sound card and/or your mother board does not have a SPDIF out port? This is what I use from my HTPC I just built, this allows my receiver to do all the decoding. Not sure about using the 1/8" jacks.
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: Computer-to-receiver hum
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Joined: Feb 2004
Posts: 1,703
connoisseur
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connoisseur
Joined: Feb 2004
Posts: 1,703 |
Definitely a ground loop issue, years ago when I would connect my PCs to the receiver with an analog connection the same thing would happen. I put the PC on a UPS and it seemed to break the ground loop and worked fine. If you did have a digital output you probably wouldn't have the issue (esp with optical interlink).
I am curious thou, whats teh Y cable doing in this senerio?
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Re: Computer-to-receiver hum
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Joined: Dec 2003
Posts: 3,602
connoisseur
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connoisseur
Joined: Dec 2003
Posts: 3,602 |
Quote:
1/8" stereo phone jack to an RCA cable, then a Y-splitter, to my Onkyo TX-DS595 tape ports
I think I'm missing something... why the Y?
Bren R.
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Re: Computer-to-receiver hum
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Joined: Nov 2003
Posts: 74
old hand
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OP
old hand
Joined: Nov 2003
Posts: 74 |
Thanks for the replies. It does appear to be a ground hum. My PC is on an UPS, so that isn't helping me as it did for Inane. My PC does have an SPDIF out port, but I have my Cambridge Soundworks PC 5.1 speakers connected to it. The Y cable is to split the single RCA cable to the receiver L/R speaker input.
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Re: Computer-to-receiver hum
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Joined: Dec 2003
Posts: 3,602
connoisseur
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connoisseur
Joined: Dec 2003
Posts: 3,602 |
Quote:
The Y cable is to split the single RCA cable to the receiver L/R speaker input.
Oops, think you may have your wires crossed... are you sure you have a stereo 1/8" to RCA cable? It should have two RCAs on the one end and a tip/ring/sleeve 1/8" at the other end... if the ring isn't there, you've got a mono cable.
Bren R.
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Re: Computer-to-receiver hum
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Joined: Mar 2006
Posts: 95
old hand
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old hand
Joined: Mar 2006
Posts: 95 |
Sounds like a 1:1 transformer is in order. We hams connect our computers to radios a lot and this is a very common problem.
-Brian n8wrl
2xM60ti, 2xM3ti, 2xQS4, VP100, EP350, N2's
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Re: Computer-to-receiver hum
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Joined: Nov 2003
Posts: 74
old hand
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OP
old hand
Joined: Nov 2003
Posts: 74 |
I solved my problem and got rid of the hum (and the Y adapter) by buying a ground-loop isolator (aka 1:1 transformer) from RatShack. Now there's no hum at all. Thanks for all your help, folks. This is why I wanted to hook my PC to my living room receiver: Music Genome Project.
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Re: Computer-to-receiver hum
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Joined: Feb 2004
Posts: 1,703
connoisseur
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connoisseur
Joined: Feb 2004
Posts: 1,703 |
Good deal.
Ya those music services are getting popular. I subscribe to Yahoo Music Unlimited and they have a similar system in place where I rate music and it trys to figure out what I might like. Works rather well and its really great as I never know what I want to listen to. Plus discovering new artists and such.
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