This headphones music test video is here to help you with audio cable problems. Test your computer speakers for PC or MAC, laptops and notebooks, iPhones and smartphones, Smart TVs, headphones, headsets, earbuds and adapters as well.

When you see LEFT and RIGHT on the screen, you should hear music on both speakers/earbuds/headphone outputs. When you see LEFT on the screen, you should hear sound on the LEFT speaker only. When you see RIGHT on the screen, you should hear sound on the RIGHT speaker only. If you hear "Right channel" from the right speaker, then it works correctly. If you hear "Right channel" from the left speaker, then your L&R cables are swapped by accident.

You have a mono sound system or a short circuit if you can hear the music on both speakers even though "Left" or "Right" is displayed.

This simple test should allow you to confirm that your sound system is wired correctly. This may seem unimportant but if you start hearing shots from the wrong side while playing a first-person shooter game or a character in a movie shouting from the left when they appear on the right in the film, it will become annoying and confusing!

Use full-screen mode to use this video more effectively. Take your time when fixing the system and fiddle with your cables and connectors.

If only a certain audio file shows the issue of having swapped channels, you can fix this easily: https://youtu.be/Ngmmhjxrdlk

I hope this is useful, please like and leave a comment if it is!

Credits:
Music "Wallpaper (2014)" by CYBERSDF from https://jamendo.com/track/1165975/ under CC-BY license
3D Character "Anime character model" by anirhapsodist from https://blendswap.com/blends/view/79241 under CC-BY 3.0 license
3D Headphones "Modern Headphones" by SteamDriven5 from https://blendswap.com/blends/view/75546 under CC-BY 3.0 license
3D Carpet "Fluffy Carpet" by TowerCG from https://blendswap.com/blends/view/73630 under CC-BY 3.0 license

CC-BY 3.0 license text: https://creativecommons.org/licenses/by/3.0/legalcode.txt