You might be able to make that work-if you live alone. The obvious solution for this type of noise is to not use those types of devices while you’re watching TV or listening to music. It might be audible through your audio equipment or visible on your TV, or it might not. Ground loops are hardly the only thing that cause electrical noise pretty much any device with a motor (hair dryers and blenders, for instance), as well as dimmer switches and failing fluorescent fixtures will create this type of interference. You’ll find plenty of information online that will show you how, but the task requires moderate skill with a soldering iron and similar tools.Ī ground loop isolator for coaxial (antenna and cable TV) cables. If you have the skills, you can build your own hum eliminator for about $10 or $15. There are other products that do roughly the same thing, some of which interrupt the loop in the signal cables, but they’re all expensive as well. If using an extension cord is impractical, you can buy a hum eliminator, such as Ebtech’s Hum X. Look up Les Harvey and Stone the Crows for an extreme example of what can happen with high-powered equipment. You could just “pull the ground” by using a three-prong to two-prong adapter but this represents a potential shock hazard. Self-powered speakers and subwoofers come to mind. There might be occasions where you simply can’t reach the same outlet with a piece of equipment. If you still get hum, see if your antenna or cable wire has its own ground connection. This leaves the receiver itself, the ATV, and the Time Capsule/router to be ruled out.Powering connected equipment from the same AC socket eliminates most ground loops. Can anyone suggest another experiment that might possibly narrow down the cause any?Īfter it was suggested that this pointed to HDMI, I have tried both plugging the HDMI cable into a different port on the back of the receiver, and replacing the HDMI cable, without success. There are so many components, and so much magic involved, that my intuition fails me. In what must be a clue of some kind, this doesn't happen for podcasts (which, unlike the music, is coming down from the Internet). In all cases, the audio drops out after a short time (3-5 mins). Running iTunes on the MBP, but instead of using the Sound icon in the menu bar to direct the sound to Great Room, I use an icon in the iTunes window whose tooltip reads "Choose which speakers to use" to accomplish the same thing.Running VLC on the MBP, again directing sound to Great Room using the Sound menu.Here are the alternate methods I've used to play my music: As if I'd punched the stop button - nothing very out of the ordinary. I go back to the MBP and the Plex Client has stopped. Then, three or so minutes later, it drops out. Then I go to the MBP's Sound item in the Menu bar, and switch it from "internal speakers" to "Great Room" (the name of my Apple TV). When I want to hear music through the speakers connected to the receiver, I first power-on the receiver, then screen-share into my MBP, start the Plex Media Client, select music, and start it playing. The MBP is running Plex Media Server to serve recorded movies and music that are stored on the external USB drive. All devices are on the same local subnet.) an external WD spinny drive containing all my media.MacBook Pro early 2013 which is connected via USB to.and also via Ether-to-Thunderbolt adaptor to.Time Capsule, which is connected via Cat 6 to.Apple TV, which is connected via Cat 6 ethernet cable to.Receiver, is connected via HDMI cable to.
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