These are the motherboards from sheep_nova. The sound section has been populated from various parts pulled from other boards or random sourced components. Note that yours has the Kabuki instead of the standard chip for example.
Mine should be arriving tomorrow and I’ll give it a quick test against an original Dash board. Judging from photos I have seen of multiple boards I was offered, there’s a mixed bag of components and methods being used to make these functional CPS-1 boards again. They’re definitely nice for the price, but would need a bit of work to bring them 100% back up to spec, including a recap with nicer capacitors.
Maybe we can all chip in and compile a full list of parts used for that section and suitable replacements.