HDMI causes buzzing sound in karaoke system

  • Thread starter Thread starter GAGracia
  • Start date Start date
G

GAGracia

New member
SITUATION:
I get a buzzing sound in karaoke system when I connect my laptop out going HDMI to 2 tvs with an HDMI splitter.......
The buzz stops completely when I disconnect the HDMI at the laptop.......
SETUP:
1) I use 2 separate electrical wall plug-in sources that are approximately 60 feet apart because I am hesitant to overload either plug-in (I expect these plug-ins are on separate wire loops to the breaker panel.)
2) 2 TVs located on opposite sides of the room are each powered by individual plug-in sources (which may or may not be the plug-in wire loops described in #1 above)
3) 1 of the plug-ins described in #1 above powers 1 - laptop, 1 - 300 amp speaker, 3 - small LED light bars, 1 - mini LED area lamp, 1 - small 10" table monitor, and an HDMI splitter (which is connects from the laptop and splits to the 2 TVs described in #2 above
4) The other plug-in described in #1 above powers 1 - 300 amp speaker, 1 - mini LED area lamp, 1 - wireless microphone headset, and 1 - live mixer console [which receives the raw music from the laptop and return mixed music and vocals back to the laptop]
QUESTION:
What do I need to do to stop the buzz sound that results from the speakers and also results in the recorded music and vocals?
 
GAGracia said:
SITUATION:
I get a buzzing sound in karaoke system when I connect my laptop out going HDMI to 2 tvs with an HDMI splitter.......
The buzz stops completely when I disconnect the HDMI at the laptop.......
SETUP:
1) I use 2 separate electrical wall plug-in sources that are approximately 60 feet apart because I am hesitant to overload either plug-in (I expect these plug-ins are on separate wire loops to the breaker panel.)
2) 2 TVs located on opposite sides of the room are each powered by individual plug-in sources (which may or may not be the plug-in wire loops described in #1 above)
3) 1 of the plug-ins described in #1 above powers 1 - laptop, 1 - 300 amp speaker, 3 - small LED light bars, 1 - mini LED area lamp, 1 - small 10" table monitor, and an HDMI splitter (which is connects from the laptop and splits to the 2 TVs described in #2 above
4) The other plug-in described in #1 above powers 1 - 300 amp speaker, 1 - mini LED area lamp, 1 - wireless microphone headset, and 1 - live mixer console [which receives the raw music from the laptop and return mixed music and vocals back to the laptop]
QUESTION:
What do I need to do to stop the buzz sound that results from the speakers and also results in the recorded music and vocals?
Click to expand...

Now see..THIS is exactly the sort of question that causes me to want it mandatory that people post the country they are in!

So, the Problem! This is a classic hum,earth or ground loop and is of course caused by earthing things twice or in this case, probably more than twice. There are logical steps to take...

First and most often the fix. Power everything from ONE power outlet. You will NOT fry the power circuits! In UK just one mains socket can supply a smell under 3 kW and that's a LOT of tellies leave alone laptops!
But our outlets are nearly all in pairs and so you can generally pull 6kW from the two. (sometimes the board breaker is 16amps so that would be still be well over 3,5kW) So you need a 10+ way mains diss board or "daisy chain" smaller ones from ONE socket.

Next make the laptop earth free. You can buy chargers that do not carry the earth pin thru to the DC side.

After that you need to "unearth" audio signal feeds such as those to powered monitors. This can be done with modified AUDIO cables or transformer units such as the Art Cleanbox ll.

DO NOT UNDER ANY CIRCUMSTANCES LIFT ANY MAINS SAFETY EARTHS!!!!!!


Dave.
 
Uh...... that would be a pair of 300 WATT speakers.

Otherwise, what ecc83 said.
 
I guess my answer of "Karaoke is evil and the buzzing is the Devil warning you to STOP RIGHT NOW" isn't going to fly then...:spank:

Perhaps we should set up a "Random sound & electrical questions that have nothing to do with home recording" forum?:laughings:
 
Somebody didn't get the memo about not busting on newbies.
 
Yeah but I put a smiley in it, so that makes it OK, right?... ;)
 
You must log in or register to reply here.
Back
Top