|Platform(s)||Windows, Linux, macOS|
|Source code||GitLab (Closed) |
GitHub (Former source)
redream is a closed-source Sega Dreamcast emulator. It was formerly licensed under GPL3 but then went closed source in January 2018. There are two editions of redream: Lite and Premium. Lite is free to everyone but you need to sign up an account to download it, while Premium is payware but added high-definition rendering compared to Lite. The emulator is one of the few if not the only Dreamcast emulator that can run without a BIOS; however, using a BIOS is highly recommended as some games may have bugs as the replacement BIOS is not currently perfect.
Operating system: Windows 7+ 64-bit, macOS 64-bit or Linux 64-bit
Processor: x86_64 compatible with AVX2 or SSE2 support
Memory: 512 MB RAM
Graphics: OpenGL 3.1 support (Order-independent transparency support is only available in OGL 4.5 or higher)
On July 2018, inolen introduced a major change to redream's audio/video synchronization in version 1.2.3 by utilizing a feature called, in his words, "MultiSync". This helps to prevent audible crackling, unexpected latency in audio and skipped or torn frames in video output. The solution does involve some added code complexity and memory bandwidth to handle the extra bits.
"It also has a few more subtle benefits:
- Lower spec machines have more time to do actual emulation work as the main thread is never blocked by vsync.
- If the user has vsync force disabled in their control panel, emulation still runs at the correct speed since it's being driven by the audio sync."
- Statement from inolen. GitLab (2018-01-08)
- Official compatibility list
- Discord chat channel for redream
- Twitter news feed for redream
- Youtube channel (Test PL)
- Showcase - Order Independent Transparency implementation on Redream (Jun 3, 2018)
- nullDC 1.0.4 vs. Redream 1.2.6 - Emulator Comparison (Hyper. Aug 13, 2018.)
- Shenmue - PC vs Dreamcast Emulators (REDREAM, DEMUL) Comparison video #1 (Emulators for PC. Aug 24, 2018.)