* Cut record with very deep grooves into a very soft material (you could even use material too soft to play back durably, ie wax, plasticine etc)
* Make silicon/latex mold of the resulting record
* Cast multiple copies in resin
I imagine you'd loose a lot (or possibly all!?) of the sound quality, but could make some interesting artifacts this way! I'm imagining thick clear resin disks with encapsulated objects etc!
![Smile :)](./images/smilies/icon_smile.gif)
From the little moldmaking I have done I think silicone would pick up enough detail to more or less work. Not sure what if any types of resin would be durable enough though...?