very loud pop in speakers when shutting down

[herbalist]

I have a Dell Optiplex GX260 with XP pro and 98SE installed. The built in sound output is too weak to drive speakers. I had a sound blaster PCI-128 with a 5507 chipset that I'd taken out of another PC. XP had no problem installing drivers for the card. Getting it working on 98 was much harder. 98 didn't recognize it. Creative support had no drivers that worked with it. I found some at driverguide that work well.

The sound card now works well on both operating systems except for one problem. When XP shuts down, it makes a very loud pop in the speakers. It's much louder than any sound or music that was being played. When the volume is turned up, it's loud enough that I'm concerned for the speakers. When 98 shuts down, the "pop" is much quieter, barely noticeable no matter how loud I have the volume set. I occasionally feed the line output of the PC into my stereo to get the better sound and higher volumes. If I forget to switch off the line input to the stereo before shutting down XP, the speaker pop is so loud that you can feel it across the room. How do I eliminate or tone down this shutdown pop on XP?

[chrisoborski]

I have a Dell Optiplex GX260 with XP pro and 98SE installed. The built in sound output is too weak to drive speakers. I had a sound blaster PCI-128 with a 5507 chipset that I'd taken out of another PC. XP had no problem installing drivers for the card. Getting it working on 98 was much harder. 98 didn't recognize it. Creative support had no drivers that worked with it. I found some at driverguide that work well.

The sound card now works well on both operating systems except for one problem. When XP shuts down, it makes a very loud pop in the speakers. It's much louder than any sound or music that was being played. When the volume is turned up, it's loud enough that I'm concerned for the speakers. When 98 shuts down, the "pop" is much quieter, barely noticeable no matter how loud I have the volume set. I occasionally feed the line output of the PC into my stereo to get the better sound and higher volumes. If I forget to switch off the line input to the stereo before shutting down XP, the speaker pop is so loud that you can feel it across the room. How do I eliminate or tone down this shutdown pop on XP?

You could add a .001 uF capacitor inline with the ground lead, but that would require soldering and disassembling the audio cable.

Instead of hacking the cable you should house it in a small project box with an in and an out and use two cables going to and from the sound card and stereo. The box would be in between the computer and stereo.. I'd suggest searching up on this first before taking my suggestions because iv'e only done this a few times just to experiment with different parts i had around.

Also I've read that you could make the same type of filter but wired from the left to ground lead and the Right to ground lead. The Capacitor would connect ground to both the left and right side creating a sort of Y. The other way i described was wired with one capacitor in series with just the ground.

Also you would want to use a ceramic capacitor not electrolytic though i doubt that low of value capacitor would be electrolytic anyways. Not sure which arrangement would perform better but this is about all you could do with a pop such as you describe.

I would use this

http://www.radioshack.com/product/index.jsp?productId=2104052

http://www.radioshack.com/product/index.jsp?productId=2062279

http://www.radioshack.com/product/index.jsp?productId=2103452

Two of these http://www.radioshack.com/product/index.jsp?productId=2944877

U might need to experiment with different rated values of these / Buy a couple different kinds...-->

http://www.radioshack.com/product/index.jsp?productId=2062362&filterName=Type&filterValue=Ceramic+disc+capacitors

Chris

Edited July 19, 2010 by chrisoborski