MAME emulates the SID but the code dates back to like 2004 and doesn't sound anywhere near as good as the modern SID emulation engines. We prefer BSD or MIT li

MAME emulates the SID but the code dates back to like 2004 and doesn't sound anywhere near as good as the modern SID emulation engines. We prefer BSD or MIT licensed components to GPL ones so there's been some hesitation to just grab one of the popular SID engines (and our base C64 emulation is generally decent if you aren't trying to break the hardware like most demos, but it's also slow because the mapper PLA is emulated in the hot path).