Keyboard is pretty amazing for C64 preservation efforts. Perhaps lessons learned could be applied to other same era systems.<p>There's one part in C64 that's becoming more and more rare — the amazing SID sound chip.<p>I wonder whether it'd be possible to have production runs of truly new 6581 and/or 8580 SID chips. Does someone still have the old masks?<p>Other chips you could emulate with an FPGA. But SID is partially analog, so it's special. Some say no two SIDs sound the same.<p>Btw, recent C64 music demo playing off 1 MB Ocean style (= ROM) cartridge (not REU):<p><a href="https://www.youtube.com/watch?v=7qxxnJVU4jQ" rel="nofollow">https://www.youtube.com/watch?v=7qxxnJVU4jQ</a><p><a href="https://www.youtube.com/watch?v=UYAf_awh5XA" rel="nofollow">https://www.youtube.com/watch?v=UYAf_awh5XA</a><p>Yes, it's real. Not particularly good example of SID though, but still impressive for 1982/83 technology.<p>But this one does show off SID; C64 "Cubase", realtime DSP (timestretch, low/high pass filter, distortion, etc.) pretty amazing:<p><a href="https://www.youtube.com/watch?v=k4GWheE4Gkw" rel="nofollow">https://www.youtube.com/watch?v=k4GWheE4Gkw</a>