I can help somewhat - I don't have the same card as you but it's very similar in that it's just the one with the OPL4 wave table chips compared to the OPL3.

The ones on the edge of the card that are used for smoothing voltages on the digital side, like the C69 and C75 capacitors are all 25v 10uF.

The ones coming off of the CS4231 audio codec which are part of the audio path are pretty much all 50v 1uF.
There appears to be a 25v 1uF in one spot on mine but having a 50v where a 25v should be should make little difference. edit: this was incorrect, there's a mark to the printing that made me think it's a U instead of a 0 at C58 on my card - really that's a digital cap hooked to the Ground plane that goes to the KIA324P op-amp.

The big caps (C16,C18,C19) on the TDA1517 are 16v 470uF.
The other large caps which I think are C14, C27, C29 and perhaps that says C28? it's the one on the opposite side of C29 down by C27, those are 16v 100uF.

Your card has some caps that mine does not and I can only guess what goes there but looking at the rest of the card, caps that go into the ground plane (C9, C12) are digital caps and should be 25v 10uF. Then there are caps that do not hook to the ground plane and should be part of the audio path (C10, C13, C23, C24) and those should probably be 50v 1uF.

You also need to re-fit the 7805 regulator and the 24.576MHz crystal.

Hope that helps you get your card working 😀 Although I can't assist fully since my card is different I can potentially measure and check stuff if needed.

I have another Mozart variation. Maybe it helps.

More pictures

edit: added picture of backside

Huh, the PCB designer for that yellow PCB must've gone to Asus after working for that company - so odd seeing the filled in part of the circle on the silk-screen be the positive side.

Thank you all a bunch for the help-- I did find some images of my specific card off an eBay seller with a good chunk of images of the caps I was most concerned about but this definitely helps even more.

Need to figure out where I misplaced the card in the last nearly two weeks... And then I can start repopulating it with a mix of new caps I have in stock and... I'll have to inevitably pull from the reclaimed parts box. There's no real way around it this time.

As far as the crystal is concerned, there should be one in the reclaimed box as it stands so I should be good there... And I think I have a '99 Mitsubishi 7805 from the very rusty SACD/DVD player thing I tore down last year, as sad as it sounds, but it got moused pretty bad in the garage prior to the move and space is at a premium. Thankfully the innards were okay.

I'll post back with pics once I have it most of the way or all the way recapped. It ain't gonna be pretty but it should do the duty.