D&D Soundboard — Free Browser Ambient Mixer

Build the perfect atmosphere for your tabletop RPG session. Layer forest, tavern, cave, and battle ambience loops — or upload your own audio files. Per-track volume and fade controls. 100% offline, zero servers.

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QUICK SCENES — ADD BUILT-IN LOOPS

Upload Your Own Audio

MP3, OGG, or WAV. Each file becomes its own looping track. Nothing leaves your browser.

Soundboard

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Add a built-in loop above or upload an audio file to get started.

How it works

The D&D Soundboard uses the browser's Web Audio API to play, mix, and loop multiple audio tracks simultaneously — all inside your tab, with no server involved.

Built-in ambience Royalty-free loops (forest, tavern, cave, battle, rain, wind, fire) are embedded as short oscillator-synthesized tones so the tool works instantly with zero downloads.
Custom files Upload any MP3, OGG, or WAV. The file is decoded in RAM via Web Audio API — it never leaves your device. Settings persist to localStorage so they survive a refresh.
Per-track volume Each track has its own gain node. Drag the slider to blend levels — e.g. quiet rain under a loud tavern crowd. The master fader scales everything together.
Looping & fade Every track loops seamlessly. The fade slider controls a 0–10 s crossfade when you hit Stop, so tracks don't cut out jarringly mid-scene.

Frequently asked questions

Does this work offline, without an internet connection?
Yes — once the page has loaded, the D&D Soundboard works completely offline. The Web Audio API runs inside your browser; no audio files are streamed from a server. The built-in ambient loops are synthesized locally, and any files you upload are read from your own hard drive. Ideal for playing at the table without relying on Wi-Fi.
What audio formats can I upload?
MP3, OGG, and WAV are accepted — the three formats with the broadest browser support. Most looping ambience packs (found on sites like Freesound.org, Pixabay, or Tabletop Audio) come in MP3 format, which works perfectly. Very large files (over ~100 MB) may take a moment to decode; keep individual loops under 30 MB for best performance.
How do I create a good tavern atmosphere for D&D?
A layered approach works best: start with a low "crowd murmur" loop at around 40% volume, add a "fireplace crackle" at 30%, then bring in a gentle "lute music" loop at 20%. If a fight breaks out at the bar, mute the lute and push crowd noise to 70%. This tool lets you fade tracks in and out without stopping playback, so scene transitions feel natural at the table.
Are the built-in sounds royalty-free and safe to stream on Twitch or YouTube?
The built-in tones in this tool are procedurally generated via the Web Audio API (oscillators and noise), so they have no copyright at all. If you upload your own MP3 files, the copyright of those files depends on their source. For streaming, look for Creative Commons Zero (CC0) licensed audio on Freesound.org or use commercially licensed packs from sites like Epidemic Sound or Tabletop Audio.
Will my soundboard layout be saved between sessions?
Built-in track selections and volume settings are saved to your browser's localStorage and restored automatically next time you open the page. Uploaded files are not re-loaded automatically (browsers don't retain file handles for security), but you can re-upload them quickly — the volume settings for tracks with the same name are remembered.