[onvn]

Hi,

My problematic system is running from a Toshiba laptop into a USB DAC (Keces DA-151)..

I have looked into scenarios of people complaining about noise in this computer audio forum and I suspect that this problem is a ground loop problem by reading into other people's situations.. but I don't know anything about electronics so can someone help me diagnose my rig problem?

Noise, when present, is independent of volume.. I have to fiddle with the kettle cable running into the laptop's PSU adaptor and just when I get the position right, the noise clears up completely. If the laptop is running with batteries, noise is also not present.. I have had this problem for about a year but never really looked into it until now because a simple kick at the adaptor cures it!!

So now I get really annoyed when this noise is audible because it can be fine for a few tracks then for no apparent reason, it comes back, then a kick at the adaptor solves it but a few tracks later it can come back, or not, like it has a mind of its own..

Can someone help? Is it a ground loop problem? Do I need a stereo isolation transformer??

Thanks in advance,

Reno.