4 layers17.5 × 35 mm

KungFuSID
Sgw32/KungFuSID
Kung Fu SID is a firmware based on Kung Fu Flash which allows SID emulation
35 parts65
KiCad boards from 2 GitHub repositories tagged “sid-chip”, the most starred first; open any of them in PCBKit.

Sgw32/KungFuSID
Kung Fu SID is a firmware based on Kung Fu Flash which allows SID emulation

tebl/C64-Stereo-SID
There are many Stereo SID boards, but this one in mine... Add a second SID of the same type or newer substitutes for adding stereo audio to your system...