I’m also having this issue. I’ve been debating if I should return the phone. But then I think that If it wasn’t for that, my phone would be perfect. I don’t want to take the risk of returning it to get another unit that’s far from perfect later. If we can get a confirmation that this is a software related issue that would definitely make my day. So far I haven’t been able to find many people speaking about this issue except for the person in this video: And this reddit thread: https://www.reddit.com/r/apple/comments/7b5gci/i_love_everything_about_the_iphone_x_except_the/ The issue is barely noticeable when playing music, it’s there but it is very hard to identify (depending on the kind of music you are playing). In my case the problem is very apparent when I put a call on speakerphone or play a voice note with a volume between 80%-100%. You should try that a see what happens.