JSIDPlay2 V4.13 features arrive with several improvements for SID music fans and Commodore 64 users. This new release, led by the efforts of Alankila and Kenchis and contributors like Wilfred Bos, pushes the boundaries of what a browser-based SID player and C64 emulator can offer.
Favorites Work Better and Hardware Support Grows
Adding songs to your favorites list now works smoothly. With this version, USBSID-Pico hardware joins the list of supported devices. “LouD” deserves credit for making that possible. This addition lets more users enjoy real hardware playback, not just emulation.
C64Jukebox Gets More Powerful
The C64Jukebox offline player now supports the SFX Sound Expander (FM-YAM). That means musicians and listeners can enjoy FM synthesis on classic SID tracks. There’s more: experimental v4e SID support lets you play up to ten SIDs at once. Chrome users can try full-screen playback on mobile, simply by rotating their phones.
Curious about how things look behind the scenes? The new oscilloscope view displays up to three SIDs. You’ll also spot Composer Photos, a SIDTune Information List (STIL), and detailed Player Infos right in the interface. The new Folders Tab provides direct access to collections like CSDB and HVSC. Thanks to several performance tweaks, playback is smoother. The virtual keyboard and filter curve visualizer add new ways to interact with your music.
Do you record or develop? A new C-Version allows creation of WAV files with cmake. There’s also a WASM_GC_SAB build for modern browsers, giving you fast, zero-copy playback.
Experience the Quad-Core Demo in Your Browser
If you love technical demos, try the legendary Quad-Core Demo. It runs directly in your browser and uses four CPU cores for smooth performance. This is a must-see for Commodore fans and anyone curious about web emulation. See the demo here.
More Than Just a Player
JSIDPlay2 is much more than a SID player. It is a cycle-exact Commodore 64 emulator, so you can play GameBase64 classics with the same accuracy as original hardware. Whether you want to listen to the High Voltage SID Collection (HVSC) or jump into C64 gaming, everything is included in one neat package.
Community Contributions Shine
Wilfred Bos leads development, but Alankila and Kenchis make important contributions. Each new release shows the team’s creativity and hard work. Because of their efforts, C64 music stays alive and continues to grow.
Final Thoughts
JSIDPlay2 V4.13 features boost SID music playback with new hardware options, multi-SID support, and an upgraded user experience. Anyone interested in SID music or Commodore 64 emulation will want to check out this update.
You can read the full release notes and try out the C64Jukebox or the Quad-Core Demo by visiting the official site.






