I don't know if this belongs here or if anyone here can help me, but I have hope. On my main computer when I play you tube videos the pitch is about a 1/4 step low. I can hear it in voices that I'm familiar with and I can also hear it when I try to play along with videos. I have multiple tuners and I have an ear so I confident that my guitar is tuned but the videos are not. If I play the same videos on another computer they are fine. No problems at all. I have looked at playback speed and it is set to normal. Increasing that speed does raise the pitch, but not to the correct point of course. I have no idea why this is happening. This is a recent occurrence. I'm using a Windows 10 box and my audio interface is a Scarlet 18i-20 on USB. My studio monitors are attached to the interface and these are what I use to listen to any audio playback from the computer. The 18i20 is NOT a recent addition. I'm not running any other audio at the same time. I do have Audacity on the same computer, but it is not running. I'm lost with all this technology stuff, so be easy on me. I am hoping someone has seen this before. Any thoughts?