I have a 2018 Mac mini on order.
I have a Focusrite Scarlett 2i2 USB audio interface.
Once I have it set up, I will test and report any audio issues with the new Mac mini.
I don't see why people are fighting here. There are indeed many threads on different forums indicating there is certainly an issue related to Apple's T2 chip and USB audio interfaces and this whole pauseaudioengine timesync kernel thing. I hope I'm not affected, but if I am, I just hope Apple does something about it.
I've had my mac mini for almost 2 weeks now.
I can now confirm - there is definitely an issue related to the T2 chip and my USB audio interface.
About once every 15m - 30m my audio will get interrupted for a second. This of course has been mentioned in other online forums and on reddit, and is reportedly due to the system time daemon automatically updating the system time and for whatever reason sends a pause-audio-engine message to the kernel.
I can even trigger it myself by checking and unchecking "set time zone automatically."
Here's what's interesting though - I used screenflow to record my computer's audio at the same time I was playing a sine wave in Logic Pro X and started to check and uncheck the "set time zone automatically" which triggered the audio glitches over and over again. However, when I go back and listen to the recorded computer audio, the pure sine wave, the audio glitches were not recorded. It was seamless. Somehow, even though in the kernel there are pause-audio-engine messages, my recording wasn't affected. It is annoying though, to be working on a song, or listening to music, and hear the audio glitch about 3 or 4 times an hour.
I'll be contacting Apple about this. The more exposure it gets, the more likely they will address it. I'm super disappointed that this is happening though. I won't return my Mac Mini because of it, but I certainly hope Apple tries to fix this since it's apparently been happening since the introduction of the T2 chip at the end of 2017.
Edit: I also tested this without the USB audio interface and there are no issues.
When I have some time I'll see if I can upload a video of the audio glitches happening.