Cinematic audio visualizer. Drop in a song and a still, pick a look, and export an MP4 on your machine.
Designed by JMHBM. Built with Grok (Harper, Benjamin, and Lucas / xAI) and Jan-4B-Base-Instruct (Menlo Labs Research). Copyright equally shared. CC BY 4.0.
Latest: 1.0.11 · Linux AppImage · Windows installer and Debian .deb still 1.0.8
Download Renderbolt-1.0.8-setup.exe from the 1.0.8 release.
64-bit Windows 10/11. Windows 11 already has WebView2; Windows 10 may need the Evergreen runtime. The installer is unsigned, so SmartScreen / Avast may warn on first run.
Hardware encode when the driver is present: AMD AMF, NVIDIA NVENC, Intel QSV. Otherwise CPU (libx264). FFmpeg is bundled.
sudo apt install ./renderbolt_1.0.8_all.debGet the file from the 1.0.8 release. Needs Python 3.10+, Tk, Pillow, NumPy, and FFmpeg. On AMD GPUs, install mesa-va-drivers.
Open Renderbolt from the app menu, or run renderbolt.
Download Renderbolt-1.0.11-x86_64.AppImage from the 1.0.11 release.
Type-2 AppImage with FUSE3 statically linked. No Flatpak sandbox, no libfuse2. Python, Tcl/Tk, NumPy, Pillow, ModernGL, and FFmpeg are inside the file. The host only needs libGL / libX11.
chmod +x Renderbolt-1.0.11-x86_64.AppImage
./Renderbolt-1.0.11-x86_64.AppImageIf FUSE is blocked:
./Renderbolt-1.0.11-x86_64.AppImage --appimage-extract-and-runHeadless:
./Renderbolt-1.0.11-x86_64.AppImage render --audio song.mp3 --cover art.jpg --out out.mp4sudo apt install python3-tk python3-pil python3-pil.imagetk python3-numpy ffmpeg
pip install -r desktop/requirements.txt
python3 desktop/renderboltHeadless (no window):
python3 desktop/renderbolt render \
--audio song.mp3 --cover art.jpg --out out.mp4 \
--look looks/night-drive.jsonStarter looks live in looks/. Keys 1–6 load the first six in the Linux studio.
Levels, Particles, Spine, and Radial wave are original implementations inspired by Cavasik (CAVA-based). Cavasik is GPL-3.0; none of its source is vendored here.
- Background still from disk, with beat bounce and edge fade
- Optional song / artist / album titles
- 2D or 3D: waveform, EQ bars, circular, liquid, levels, particles, spine, radial wave
- Color presets, custom palette, base → tip gradient
- Place, rotate (0–360°), stretch, and mirror
- 16:9 · 9:16 · 1:1 · 720p / 1080p / 4K · 24 / 30 / 60 fps
| Key | Action |
|---|---|
| Space | Play / pause |
| G | Generate MP4 |
| R | Shuffle look |
| 1–6 | Starter looks (Linux studio) |
| S | Save current frame (PNG) |
| F1 | About |
| ← → | Seek 2 seconds |
| Home | Restart |
| Ctrl+O | Open audio |
| Ctrl+I | Open background |
CC BY 4.0 — credit JMHBM.