Click Grid
to Add Notes
Create chiptune music instantly in your browser. Click the grid to add notes, press play to hear your creation, and export when you're done.
Loading UltraBox Editor...
UltraBox is a browser-based BeepBox-family music editor for making chiptune and 8-bit music. It combines 6-operator FM synthesis, expanded channels, custom sampling, themes, modulation, and offline options in one workflow. The project brings together ideas from more than 30 BeepBox mods while keeping the familiar pattern-and-bar editor.
The editor is useful for both first sketches and larger arrangements. Start with a small loop, save the full song URL, and add samples, FM sound design, or modulation only when the project needs them. That progression keeps the interface approachable without hiding the deeper controls.
UltraBox integrates the best features from popular BeepBox mods. Access all tools in one powerful music editor without switching platforms.
Professional 6-operator FM synthesis for complex, authentic chiptune sounds. Create rich textures with advanced sound design capabilities.
Customize your music creation experience with themes, custom samples, and flexible UI options. Make this chiptune editor truly yours.
UltraBox brings several BeepBox-family workflows into one editor. Other forks may be a better fit for a smaller interface or a specific sound-design style, so use the comparison below as a practical feature map rather than a universal ranking.
| Feature | UltraBox β¨ | JummBox | ModBox | BeepBox |
|---|---|---|---|---|
| FM Operators | 6 | 4 | 4 | 0 |
| Custom Samples | β | β | β | β |
| Max Channels | 32 | 16 | 12 | 8 |
| Custom Themes | β | Limited | β | β |
| Sample Extractor | β | β | β | β |
| Offline Version | β | β | β | β |
Compared with smaller BeepBox forks, UltraBox offers a broader set of controls: 6-operator FM, custom sampling, expanded channels, and modulation. The tradeoff is a longer learning curve, so start with the basic grid and add one advanced feature at a time. Use the linked guides and official project sources to verify behavior as releases change.
Select from hundreds of presets including classic chip waves, FM synths, and custom samples. Each preset in this music editor gives you instant professional sounds for chiptune creation.
Click on the grid to add notes in the online music editor. The editor plays them automatically so you can hear your chiptune creation in real-time as you compose.
Create different patterns using the numbered boxes in the music editor. Arrange patterns to build complete chiptune songs with verses, choruses, and bridges.
Use multiple channels to layer melodies, bass, and drums in your composition. UltraBox supports up to 32 channels for complex chiptune arrangements and professional music production.
Export your chiptune creation to WAV/MP3 or share the URL with other musicians. Share your 8-bit music with the UltraBox community on Bluesky using #beepbox.
Learn advanced UltraBox features and practical techniques for chiptune music creation.
UltraBox's 6-operator FM synthesis opens up a world of sound design possibilities. Unlike traditional subtractive synthesis, FM synthesis creates complex timbres by modulating one oscillator with another. Experiment with different algorithms to create everything from bell-like tones to aggressive bass sounds. The feedback controls add harmonic richness, while the precise frequency ratios let you dial in exact harmonic relationships.
Learn FM Synthesis βTransform UltraBox into a full-featured sampler by importing your own audio. Use the built-in sample extractor to convert soundfonts (SF2 files) into individual samples. Upload samples to a CORS-friendly host like File Garden, then import them via URL. Control loop points, playback direction, and apply filters for maximum flexibility.
Explore Sample Library βModulator channels let you automate any parameter in real-time. Create tempo changes for dramatic effect, use pitch modulation for vibrato or glissando, or automate filters for evolving textures. You can even record modulation in real-time by holding Ctrl/Shift while moving sliders during playback.
Learn Modulation Techniques βPersonalize your workflow with custom themes. Import themes from other BeepBox mods, or create your own using the theme editor. Customize colors, backgrounds, cursors, and even fonts to match your aesthetic preferences.
Most visitors come here to open the editor, compare UltraBox with BeepBox, download an offline build, or learn how custom samples work. Use these official guides to jump directly to the page that matches your search.
Compare UltraBox and BeepBox side by side, including channel limits, FM synthesis, custom samples, themes, and when each editor makes sense.
Read the comparison βDecide whether JummBox or UltraBox is the better BeepBox mod for sketches, custom samples, larger arrangements, and offline editing.
Compare JummBox and UltraBox βNeed UltraBox offline? Use the official download guide to choose the right Windows, macOS, Linux, or portable HTML release from GitHub.
Open download guide βExplore the built-in sample library, learn how to add custom samples, and convert SoundFont files before importing them into UltraBox.
Explore samples βFind public BeepBox song examples, learn how shared song URLs work, and move simple sketches into UltraBox when you need more production depth.
Learn from song examples βCompare UltraBox, JummBox, ModBox, GoldBox, AbyssBox, and default BeepBox before choosing the right fork for a song.
Compare BeepBox mods βShortlist BeepBox, UltraBox, JummBox, AbyssBox, Slarmoo's Box, and smaller forks by sound design, arrangement size, and migration risk.
Compare alternatives βLearn how to preserve the full song URL, export audio, keep JSON/project backups, and protect custom sample references.
Open saving guide βConnect with chiptune enthusiasts and music creators worldwide. Share your compositions, discover inspiration, and learn from fellow musicians in our active online music community.
Follow #beepbox to see the latest community creations and share your own music
View Feed βJoin the BeepBox Modding server for support, collaboration, and discussions
Join Discord βContribute to development, report issues, or download the official offline version
Download Guide βBrowse thousands of songs in the Twitter archive and discover inspiration
Browse Archive β