Free app for Dungeon Masters · Mac & Windows

Set the mood in one click.

Build your scenes before the session. A crackling fire, a tavern crowd, a lute, stacked into one moment. Then, mid-game, a single click plays the whole thing. No hunting through browser tabs while five players wait on you.

Free right now Runs fully offline Version 1.3.0 · Mac & Windows
D&D Audio Sea of Storms
Curse of the Deep Homebrew Campaign
Sea of Storms
1Local Tavern
A warm candlelit tavern
3 layers · playing
2The Docks
Stormy docks
4 layers
3The Cellars
Torch-lit dungeon
2 layers
Local TavernSea of Storms Stop
How it works

You prepare the scenes ahead of time, then play them in one click

A soundboard asks you to trigger sounds while you are running the game. That is the opposite of what a DM needs. You are already reading the table, calling rules and keeping five people moving. So the work happens beforehand, and the table only ever costs you one click.

Prep between sessions

Lay your world out the way you already think about it: Campaigns, Locations, Scenes. The tavern, the docks, the boss chamber. Built on a quiet evening, not at the table.

Stack the layers

A scene is several sounds looping together. Crowd murmur, a lute, a crackling fire, each with its own volume. Build it once, reuse it every session.

One click at the table

Click the scene and every layer fades in together. Click another and they crossfade. No dead air, no scrambling. Your attention stays on the game.

Layers move independently

The party is drinking in the tavern when the fight breaks out. Drop the combat music straight over the top. The crowd keeps murmuring, the fire keeps crackling, the music rises underneath. One click, and you never stopped narrating.

Your audio, not someone else's library

Paste a YouTube link and it becomes a layer you can trim and loop, alongside any files you already own. You are never limited to a catalogue somebody else curated. If you can hear it, you can build a scene from it.


Everything it does

Try each feature before you download

Pick one from the list and watch it play out on this page.

One scene · 4 layers looping together
Crackling hearth
Tavern crowd murmur
Lute & fiddle
Rain on the roof

Layered soundscapes

Stack as many looping tracks as you like. A crackling fire, a tavern crowd, a lute, all blending into one living scene.

The Docks Local Tavern Local Tavern → The Docks
Local Tavern fading outThe Docks rising in

Seamless crossfades

Click the next scene and the two equal-power crossfade. No volume dip, no dead air. You set how long the blend takes.

↓ Drag the sliders ↓
Hearth
Crowd
Bard
Rain

Per-layer mixer

Every sound has its own volume and mute. Go ahead, drag them. Balance the whole room in a few seconds.

youtube.com/watch?v=ambience
Medieval Tavern Ambience | 3 HoursAmbience Channel · 3:00:00
Trim to the good part0:42 selected
Added

Add straight from YouTube

Paste a link, trim to the part you want, and it's in your library ready to loop. No downloads to hunt down. Works right out of the box.

Keeps playing while you browse anywhere
Local TavernSea of Storms Stop

Always-on mini player

A slim bar follows you everywhere in the app: master volume and a graceful fade-out Stop, always one reach away.

Uploaded: 0 bytes Works with Wi-Fi off Stays on your computer

Private & fully offline

Everything lives on your computer. Nothing is uploaded, nothing phones home. You can run the whole night with the Wi-Fi off.

Plus the quiet extras: Gap-free looping Drag to reorder Categories & tags One-folder backup Adjustable fade length
D&D Audio Mixer icon

Download D&D Audio Mixer

Free right now, on both platforms, and yours to keep. Grab it for your machine and you're mixing in about a minute.

Mac
Download for Mac · .dmg
  • macOS 11 Big Sur or later
  • Universal · Apple Silicon & Intel
  • ~332 MB
Windows
Download for Windows · .exe
  • Windows 10 or later
  • 64-bit
  • ~156 MB
Version 1.3.0 · Mac & Windows release together Free · no account needed

First-time setup (about a minute)

On a Mac

  1. Open the downloaded .dmg and drag the gold die icon onto your Applications folder.
  2. Open Applications and double-click D&D Audio Mixer.
  3. First launch only: macOS asks about an app "from an unidentified developer." Go to System Settings → Privacy & Security, find the D&D Audio Mixer line, and click Open Anyway.

On Windows

  1. Run the downloaded DnD-Audio-Mixer Setup .exe.
  2. First launch only: if a blue "Windows protected your PC" box appears, click More info, then Run anyway.
  3. The installer does the rest and the app opens on its own.
Both warnings are normal for free indie apps that skip the paid store certification. They say nothing about safety. You see it once, then the app opens like any other. After that: start building your first campaign. 🐉
From the developer

Hi, I'm Jordan.

My background is in design, and I'm still learning the development side. I built D&D Audio Mixer for my own campaign, and it made our sessions so much better that I figured I might as well share it with other tables.

So if you hit a bug, or there's a feature you'd love to see, I'd genuinely like to hear about it. That's the fastest way this app gets better for everyone.

One small ask: please be patient with me. I'm new to development and building this in my spare time, so fixes and new features can take a little while to land. But I read every email that comes in.
FAQ

Common questions

Is it really free?
Right now, yes. Completely free, no account, no ads, nothing held back. I am building it in the open and I would rather have people using it and telling me what is broken than charge for something half finished. It may become a small one-time purchase later once it is more mature, but anyone who downloads it while it is free keeps it permanently. It runs on your own computer and never checks in with me. If you want to support it in the meantime you can buy me a coffee, but that is entirely optional.
How does it compare to Syrinscape?
Syrinscape sells a big library of professionally made sounds and charges monthly for it. This layers audio you already have, for free. If you want a finished library, theirs is genuinely better. If you already have music you like, this is the simpler answer. There's a full comparison here.
Does it work on Windows?
Yes! As of version 1.2, D&D Audio Mixer runs on both Mac and Windows: macOS 11 or later (Apple Silicon & Intel) and Windows 10 or later (64-bit). Both versions release together, so neither platform waits on the other. Grab yours from the download section above.
Why does my computer warn me the first time I open it?
Because it's a free app made by one person, not sold through Apple's or Microsoft's stores, so your computer asks for an extra confirmation the first time. On a Mac: System Settings → Privacy & Security → Open Anyway. On Windows: in the blue "Windows protected your PC" box, click More infoRun anyway. Either way you only do it once, it's completely safe, and the app runs entirely on your own computer.
Where do my sounds and campaigns live?
Everything is stored safely on your own computer, in the app's data folder. Your original files are never touched, since the app keeps its own copy. To back everything up, just copy that one folder (there's a button for it in Settings). Nothing is ever uploaded.
Do I need to be online to use it?
No. Once it's installed, everything works offline at the table. You only need a connection if you want to pull a new track in from YouTube.