I recently switched from using a Focusrite device as my main audio output device on my mac for sound, to my CQ-20B.
Since doing so, if I am playing sound (like through youtube or vlc) and it unexpectedly stops without me hitting the “stop” or “pause” button (Like if the tab or app is closed), it makes a horrible high-mid pitched buzzing tone until another sound source starts. It’s VERY reproducible. I took a video of it because it’s easier to see than to explain. I can’t figure out how to upload videos in this forum so I threw it up on youtube: https://youtu.be/eA41KycwdlY
This never happened with the Focusrite, so I think it’s pretty unique to the CQ-20B