static noise occurs when splitter is used at the green sound module output

Happy Hopping

Supreme [H]ardness
Joined
Jul 1, 2004
Messages
6,783
so at a friend's house, he has a yamaha integrated amplifier, as well as a pair of PC speaker from Altec Lansing. If we connect the plug from either one of these to the sound card green output, it plays fine.

But if we use a splitter, connect both of the above, and from the converter to the green output sound, there is a low hummmmm, some sort of static sound on top of the regular sound that is plays

the question is, how do you fix it?
 

B00nie

[H]F Junkie
Joined
Nov 1, 2012
Messages
8,487
so at a friend's house, he has a yamaha integrated amplifier, as well as a pair of PC speaker from Altec Lansing. If we connect the plug from either one of these to the sound card green output, it plays fine.

But if we use a splitter, connect both of the above, and from the converter to the green output sound, there is a low hummmmm, some sort of static sound on top of the regular sound that is plays

the question is, how do you fix it?
It's called a ground loop. You can try to fix it by using the same power outlet for all the devices or buy a galvanic separator to the RCA line. The hum comes from an AC current flowing between the devices, resulting from a slight difference in ground potential between the devices. You can get a galvanic separator from Parts Express etc. for a few bucks.
 

pendragon1

Fully [H]
Joined
Oct 7, 2000
Messages
22,967
yeah its a ground loop. try a ferrite filter or a ground loop isolator. idk what a galvanic separator is...
 

pendragon1

Fully [H]
Joined
Oct 7, 2000
Messages
22,967
same shit differenet pile, go cheap. all the are, typically, are ferrite filters/chokes in a box with a headphone in/out. if you have an old vga cable it might have a snap-on choke or if you have one to sacrifice you can cut one off.

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