JSIDPlay is a Commodore C64 cycle-exact emulator optimized for sound reproduction. It is also a SID player for music collections like HVSC and CGSC. JSIDPlay2 can load SID (PSID/RSID), MUS, DAT, P00, PRG and STR sound files. It can play mono and stereo formats. External SID filter definitions are possible. And you can also use it like a real C64 to watch demos or play games.