I have a 5.1 surround sound speaker set, 1 computer, and one laptop. Both the computer and laptop use the speakers frequently, but not usually at the same time. So, to save a lot of time and effort and because all wires at my desk are run under the desks and zip tied, I wanted to make both able to plug into the speakers at the same time.
So, what I decided was to plug a Y-adapter into the 3 audio out jacks on my computer, then run a cable from one of each Y-adapter's outputs to the amp, and a cable from the other output of each adapter to my laptop.
So the wiring sort of looks like this from one end to the other:
................Computer
Laptop=====^^^======Amp==Speakers
Simply, the laptop is connected to the amp through 2 male-male patch cables coupled by the 2 inputs of a Y-adapter. For the computer the Y-adapter is just a 6 inch extension.
So, the laptop plugs into the Y-adapters at the computer which are also connected to the amp so that even if the computer is off, I can use my laptop for audio. Likewise, if the laptop is off and the computer is on, it is connected directly to the amp through the Y-adapters.
The only problem is that when BOTH the computer AND laptop are connected with all the cables, I get sort of a static/feedback kind of noise on the speakers. I've double checked every cable for defects. The problem ONLY occurs when the computers are coupled by the set of audio cables, regardless of whether they are powered on (well, the computer anyways. I haven't tried turning off the laptop while plugged in).
Is there any simple way to fix this? Is there some problem with common grounds here? Because all 3 devices (PC, laptop, amp) are plugged into the same power bar. I don't really want to start making a real circuit here, but if some resistors or diodes perhaps (maybe caps?) could stop this buzzing, it would be really nice.
Does anyone know a cheap way to hopefully stop the buzzing when the computers are connected? Thanks
So, what I decided was to plug a Y-adapter into the 3 audio out jacks on my computer, then run a cable from one of each Y-adapter's outputs to the amp, and a cable from the other output of each adapter to my laptop.
So the wiring sort of looks like this from one end to the other:
................Computer
Laptop=====^^^======Amp==Speakers
Simply, the laptop is connected to the amp through 2 male-male patch cables coupled by the 2 inputs of a Y-adapter. For the computer the Y-adapter is just a 6 inch extension.
So, the laptop plugs into the Y-adapters at the computer which are also connected to the amp so that even if the computer is off, I can use my laptop for audio. Likewise, if the laptop is off and the computer is on, it is connected directly to the amp through the Y-adapters.
The only problem is that when BOTH the computer AND laptop are connected with all the cables, I get sort of a static/feedback kind of noise on the speakers. I've double checked every cable for defects. The problem ONLY occurs when the computers are coupled by the set of audio cables, regardless of whether they are powered on (well, the computer anyways. I haven't tried turning off the laptop while plugged in).
Is there any simple way to fix this? Is there some problem with common grounds here? Because all 3 devices (PC, laptop, amp) are plugged into the same power bar. I don't really want to start making a real circuit here, but if some resistors or diodes perhaps (maybe caps?) could stop this buzzing, it would be really nice.
Does anyone know a cheap way to hopefully stop the buzzing when the computers are connected? Thanks