Cool. My DSUB15 is a bit weird... That's why it might not fit. I will test tomorrow with my card. Here are already the current OpenSCAD and STL files.

Have some problems with the model, seems its rendered wrong:

EDIT:
WARNING: Can't open include file 'dsub.scad'.
Compiling design (CSG Tree generation)...
WARNING: Ignoring unknown module 'dsub', in file ISA Bracket.scad, line 37.

Where can i get dsub.scad ?

https://www.thingiverse.com/thing:2779088

I forgot to put it into the archive. Just unpack it right next to the file. Also hit F6 to make OpenSCAD actually compute all the CSG.

Here is the updated bracket, which now fits my card perfectly. If you have a different DSUB15 connector, you can make the attachment ears shorter.

And here it is.

That's a really pretty bracket!

But how well does the card fit in the slot with that type of DA15 socket and the bracket on? Does it fit normally or do you have to wiggle around a lot?

Oh, it's a terrible fit. The problem is the socket. I picked the wrong one and it is protruding ~2mm too much over the PCB edge. So I recommend picking a different one. I might order a better one on my next Mouser order and desolder this one. With a better socket you can shorten the ears for attaching the bracket and then it should fit nicely.

Yeah. A fitting DA15 socket would definitely be advisable.

By the way: Thanks for the video with the comparison of the SwinSID, ARMSID and 6581 and the short programming example! (https://youtu.be/CofVqoxVomE)
As matze79 mentioned in a comment, the pitch of the SwinSID is off because it uses its own clock source instead of the one provided by the card.

Incidentally, bristlehog made various MIDI drivers for the SSI-2001 back in 2014: Innovation SSI-2001 MIDI driver.
These drivers greatly expand the range of software (especially games) that can use the SSI-2001.

Yeah but with 3 Voices i would not expect much, as music is not composed for SID it sounds dull 😀

try PX MIDI For Example.
Thats also the Case with Tandy 3 Voice 😀

I know. A more sophisticated driver could try to e.g. play chords with a single voice by picking a rectangle wave with a pulse width that yields the desired harmonics.
One could also use two cards in parallel. Maybe even different ones like an SSI-2001 and a Tandy PSG card.

I have added some high-res product photos to the git repo.
Here's a preview:

How do you like this sticker design?

The purpose of the sticker is to cover up the µC in the SID-less configuration.
The design is loosely inspired by Eastern Bloc white(ish) CERDIP packages that were used for Z80 clones and such. So why not use it for a SID clone?
I picked the white package design because you wouldn't want to print anything black with price-of-liquid-gold inkjet ink.

I wonder if we could get a dummy IC package... 😀

hehe locks funny, but will it glue to the socket ? without getting lose ?

any progress with stm32 code ?

root42 wrote on 2020-07-29, 22:16:

I wonder if we could get a dummy IC package... 😀

If a dummy is all you need, you could take any random 28-pin chip, drill the die out from below and plug it in.
... Or look for the worst-rated Aliexpress shop for SID chips and buy a piece of plastic with legs from them.

matze79 wrote on 2020-07-30, 11:19:

hehe looks funny, but will it glue to the socket ? without getting loose ?

any progress with stm32 code ?

This is just a piece of paper to demonstrate the effect, but double-sided adhesive tape should work.

No. No code, yet. That would take more time than soldering a board and would also be a lot less meditative.

Benedikt wrote on 2020-07-30, 13:10:

root42 wrote on 2020-07-29, 22:16:

I wonder if we could get a dummy IC package... 😀

If a dummy is all you need, you could take any random 28-pin chip, drill the die out from below and plug it in.
... Or look for the worst-rated Aliexpress shop for SID chips and buy a piece of plastic with legs from them.

I would be afraid to plug that into the card. Who knows how those legs might be connected internally 😜

Benedikt wrote on 2020-07-30, 13:10:

No. No code, yet. That would take more time than soldering a board and would also be a lot less meditative.

Hehe maybe some day 😀

One could use the STM32 SID emulator without ISA interface as a quick intermediate step.
A sound card that can play SID tunes (only) while sitting on a shelf wouldn't be particularly useful, but still funny.

While everything else about this project is currently on the back burner, I can now at least provide empirical proof that you can build a bracket for the card with nothing but a few metal drills and files.
This is what the result looks like:

Hi, Nice project.

I started to look at the .SID file format, but the files include C64 assembly code, so I giveup the idea to support this one day