I used MixMeister live and realized you get alot of noise out of the built in sound card on the laptop. If I run it on battery the noise goes away. If I plug it in, I get some type of grounding noise.

I think this is created by the soundcard not being properly grounded when the vendor built the laptop.

So, I have ordered an Edirol external USB sound card. I am wondering if anyone has experienced the same problem and if a USB sound card fixed the issue?

I run with a M-Audio Transit, but I still get a hum on one of my notebooks, and no hum on the other. Basically, bad m/b design.

This post has a few thoughts on it.

I use the 3 to 2 prong convertor, and the problems gone, picked 2 up for a $1, at the local dollar store.

hi celtic, read your post bout noise with ps pluged in, here,s a cheep trickto get rid of it ,sometimes works sometimes dont but not gonna cost u much to try, get down to maplins buy 4 of there clip on power line magnets, start with 1 just after the mains plug, clip it on and see if the noise has gone , NO put another just before power supply ,check again, if not 1 after power supplt and again if noise not gon, 1 about 10" before notebook plug in , ,you can then move them up or down till u get rid of noise, even if u get an external sound card u are gonna get noise as soon as you plug powers supply in so the magnets are your best bet at first, hope that helps
Al

quote:

Originally posted by phreaq:
I run with a M-Audio Transit, but I still get a hum on one of my notebooks, and no hum on the other. Basically, bad m/b design.

This post has a few thoughts on it.

I use the 3 to 2 prong convertor, and the problems gone, picked 2 up for a $1, at the local dollar store.

Out of interest, is this an explanation/fix for ground loop hum?.

Omlette-

Yes - Lifting the ground is for ground loops.
Plugging the laptop into a conditioned power supply might help too.

Same goes for external Hard drives with grounded plugs.

The magnetic thing is for RF interference.