Audio Sync Issues with Virtual Channels

I'm just confused on some audio sync issues I'm experiencing with virtual channels. I thought it could be a file type issue because on my Apple TV only 2 out of the 3 virtual channels I stood up is having the problem (it's probably only a few milliseconds off, but it's enough to be noticeable). However, on my iOS devices there are no sync issues at all. It's perfect. So what's the difference between Apple TV and my iPhone?

Is your Apple TV ethernet hard-wired? Obviously your iPhone is using WiFi.

THAT could be the difference in network latency between the two different connections.