Hi
I have the same problem : sometimes (frequently !), when playing sound (any source) the output (audio jack of the mic array v2) is corrupted with an horrible loud noise identical to the exemple provided by k.sadohara.
Any idea or suggestion of how to identify the problem and correct it please ?
Otherwise, the card is really great, capture quality is excellent, but that noise prevents any use of it, as this screech/noise really kills your hears, depending of the volume.
Hardware : Mic array V2 card connected via usb cable to a Pi3 B+. Power 5V 3A.
I have been using the card input/ouput for many hours now (https://snips.ai/)