Nice to know, but strange to release a card with a wrong (?) crystal? I know the PAS has a high pitch issue when there is a PSU without -12V, but that's probably not the case with this card?

I just got a few boxes full of old hardware. A lot of network cards, but also quite some very nice old sound cards. But this one I can't ID. I have found some Russian forum, but no real answer there. I have also found someone calling it a Yamaha PS-YM-01 (so I wrote that on the back) but I can't …