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06-11-2006, 03:39 AM
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#1
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Variable Bitrate
Join Date: Apr 2006
Posts: 289
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Onboard sound crackling DC-DC
Hi , I have a problem that im getting weird sounds using onboard sound on my epia 13000 causing cracklng and whininy noise car is stationary , any ideas? im using a dc-dc psu will a external sounds card solve this , also I still get a thump with a m1-atx
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06-12-2006, 01:04 PM
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#2
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Join Date: Mar 2004
Location: Little Elm, Texas
Posts: 13,481
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do you know what alternator whine is? or engine noise?
does it sound like any of these?
are you running aftermarket amplifiers? are you running the stock sound system?
having all of this information is kind of critical to being able to help you out here.
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06-12-2006, 05:07 PM
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#3
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Variable Bitrate
Join Date: Apr 2006
Posts: 289
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Quote: Originally Posted by Red GTi VR6
do you know what alternator whine is? or engine noise?
does it sound like any of these?
are you running aftermarket amplifiers? are you running the stock sound system?
having all of this information is kind of critical to being able to help you out here.
I know what they sound like it isnt alternator whine , as the car is off or engine noise , i think it might be a bad ground for the computer so i might try another ground after my m1 is fixed
Many thanks
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06-12-2006, 05:48 PM
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#4
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Join Date: Mar 2004
Location: Little Elm, Texas
Posts: 13,481
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please let us know if grounding the PC helps at all.
good luck!
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06-12-2006, 05:58 PM
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#5
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Variable Bitrate
Join Date: Apr 2006
Posts: 289
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1et you know in 3 days 
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06-12-2006, 07:09 PM
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#6
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Join Date: Mar 2004
Location: Little Elm, Texas
Posts: 13,481
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3 days?
why so long? we can't wait that long!
hehe
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06-12-2006, 07:58 PM
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#7
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Variable Bitrate
Join Date: Apr 2006
Posts: 289
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MY M1-atx Blew up  waiting for a replacement hold on! 
Haha
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06-14-2006, 02:21 AM
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#8
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FLAC
Join Date: May 2001
Location: USA
Posts: 1,352
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You may already know this but I'll offer some tips, just in case. Make sure to get a good metal-metal connection. So sand down any paint at the grounding point and I recommend the use of star washers, too. Use the same guage wire as you did for your 12v+ and keep it under 16" in length.
I had a problem with weird noises, clicks, hdd/cd-rom spinning, etc through the speakers for a long time. Finally last week I added a good ground to my case (near the sound card - not sure if this makes a difference or not) and I'm amazed at how clean the sound is now.
Let us know how it goes.
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06-14-2006, 02:23 AM
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#9
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Variable Bitrate
Join Date: Apr 2006
Posts: 289
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Thanks for that tip , Im going to screw the case through the floor in the car so that should ground it and then the negitive wire im going under the front seat with the tips that you said
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06-14-2006, 02:25 AM
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#10
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Unregistered User
Join Date: Feb 2001
Location: Raleigh, NC USA CarPC Ver3: [▓▒▒
Posts: 1,568
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Have you tried muting different audio sources?
__________________
ODYSSEY
Quote: Originally Posted by Tidder  Hey, as long as it's not any particular race I'm offending, I can stand to be a pedophile.
All information expressed in this post is my opinion, and should not be regarded as a statement of fact. Digital-Car UK|
(\__/)
(='.'=)
(")_(")
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06-14-2006, 08:54 AM
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#11
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Join Date: Mar 2004
Location: Little Elm, Texas
Posts: 13,481
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Quote: Originally Posted by Philhop
Thanks for that tip , Im going to screw the case through the floor in the car so that should ground it and then the negitive wire im going under the front seat with the tips that you said
are you going to remove carpet and paint when you do this?
the small amount of contact that the screw makes isn't nearly enough to be considered a good ground.
Also, by going under the seat - what are you going to ground to? a seat bolt? If so, I suggest THROUGHLY cleaning every bit of paint, gunk, etc out of the threads on both the bolt and the hole.
Good luck!
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06-19-2006, 05:05 PM
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#12
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Variable Bitrate
Join Date: Apr 2006
Posts: 289
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Success NO NOISE! Grounded under the front seat and whola theres alot of noise running through my cars power lol
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06-19-2006, 05:06 PM
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#13
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Join Date: Mar 2004
Location: Little Elm, Texas
Posts: 13,481
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there's a lot of noise running through all cars power...heh
glad you got it all worked out!
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06-19-2006, 05:16 PM
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#14
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Variable Bitrate
Join Date: Apr 2006
Posts: 289
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Its funny like I plug my ipod charger in and theres noise all kinda random things like that , now im about 80% complete will post pics soon one bad setup , just waiting for replacement harddrive
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06-25-2006, 05:03 PM
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#15
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Variable Bitrate
Join Date: Apr 2006
Posts: 289
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Moved pc to trunk , great ground location using a external soundcard linked to a line driver and complete success no noise! Grounding is the key
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