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. Changes in this version: PSIDv4 support, ReSID 1.0 beta and Resid-fp Distorion simulation for each SID. And all emulation parameters can now be altered while playing a SID. Android client version beta is also available.