I also purchased a 16MB pro in March, fully spec'd out over $3000. I purchased it specifically to record audio semi-professionally, and do semi-pro video which I have been unable to do. I have considered reaching out to people to see if there's interest in a class action suit. This is not acceptable. After endless troubleshooting, I've determined this is some type of bug. The issue for me is random. I'll be working in Logic Pro and everything is just fine. Then, out of the blue, playback will sound like it's being processed from a resonator, sounds like Darth Vader, stuttering/skipping, almost as if it's a buffer issue. It happens with all buffer settings, and it happens with no plugins.(latest version of Logic Pro, etc). Changing buffer (I assume this reinitializes core audio or something) fixes the problem temporarily. (so does a restart of Logic - not acceptable) Even after a buffer change/restart, after a ramdom amount of time, the problem will come back. Not acceptable and extremely embarrassing to say the least. I agree with one poster that this could potentially be a thermal issue as the problem doesn't start until some period of use. Another issue I have is when using Logic Pro, if I stop it, then open up you tube and play something there, it sounds similar - like darth vadar/resonator/stuttering. Not always, random. There have been times when I DID NOT use Logic after a reboot, started youtube, and then after 20-30mins, the audio problem started. Even though I wasn't using Logic, I went into Logic and changed the Audio buffer, when back to youtube, and it was ok. I have the Midi settings at 48khz, and I use an external mixer (Behringer X32) and have no issues with any other Macs. (most are running pre-Catalina OS.) As a final hope, I did upgrade to Big Sur last week. It seemed stable after a while (hour or so) , but alas, after about 30-40mins of using Logic, I went to open youtube and it was doing the same thing. (playing audio, but sounded like it was playing through blown speakers). I have recorded the output to a USB stick on my Mixer and can post somewhere if anyone has a similar issue. Bottom line, this is not acceptable. Maybe we need a dedicated web site for people who are having this issue to share experiences and maybe find a lawyer that would be willing to help. Contact me if you are interested in pursuing that. At this point, I would want a full refund so I can buy something that works. I was worried when I bought this and realized that I would no longer have support for 32 bit apps/plugins,and wonder if this could be an issue with 64bit core-audio drivers or something?