It seems like you are experiencing an issue where running iTunes in the background while downloading or syncing, and then trying to watch media on another player, causes sound problems. Similarly, if you open the media player first, and then open iTunes, you encounter the same sound issue. This problem might be due to conflicts between the audio outputs of the two programs. Here are a few troubleshooting steps you can try to resolve this issue: 1. Restart Both Programs: Close both iTunes and the media player, then reopen them in the desired order and check if the sound works correctly. 2. Check Audio Settings: - Open the "Sound" settings on your computer and ensure that the correct audio output device is selected. - Check...