A native macOS mixer for wireless lav mics, made for the DJI Mic Mini 2S. Plug the receiver into your Mac and control every transmitter from one window: gain, mute, levels, names, recording, and separate feeds for your stream and the venue's PA.
Built for running live event streams and podcasts with up to eight tracks: the four DJI mics plus any other mic or audio interface on your Mac.
Get Lavboard from the latest release: download the .dmg, open it and drag Lavboard into Applications. It is signed and notarized by Apple, so it opens like any other app.
Lavboard checks for updates every time it starts. When a new version is out, an Update button appears in the toolbar: one click downloads it, installs it and restarts the app. You can also choose Check for Updates… from the Lavboard menu. (Version 0.1.0 predates the updater, so install 0.1.1 or later once by hand.)
You need macOS 15 or later. Wireless mic control needs a supported mic system; without one, Lavboard works as a mixer for your other inputs.
A native Windows version is in progress in windows/. It isn't released yet.
- Up to eight tracks, each with a live meter, fader and mute. Start with one per DJI transmitter (with battery status), then click Add track for a USB mic, the built-in mic, a webcam, a Bluetooth mic, a channel on an audio interface, or the sound of an app. Remove any track you don't need. Right-click a strip to rename, recolour, re-source, reorder or remove it.
- App audio as a track: what one app plays (a video call, a browser, music) or everything on the Mac. It keeps playing on the Mac as usual and joins the stream and recordings. macOS asks once for permission to record app audio.
- Mono or stereo per track. Stereo tracks take an input pair and get a balance control.
- Mute with keys 1 to 8. Mutes are instant and click-free.
- Hardware gain on each transmitter (-12 to +12 dB), confirmed by the receiver, and on other inputs when the device allows it.
- Names and tape colours per track, so you know who is wearing which mic.
- Multitrack recording: one WAV per track (recorded before mute and fader, so a cough-mute never loses material) plus a stereo mix. Optional backup recording on the transmitters themselves.
- Stream output through a built-in virtual mic called "Lavboard" that Streamlabs, OBS or any other app can select.
- Venue output to any wired output, with its own level and per-mic sends. It adds about 6 to 8 ms on top of the wireless link.
- Receiver settings such as channel mode, noise cancellation and low cut, for systems that have them.
Each wireless mic system is supported by its own module, so adding another brand doesn't touch the rest of the app.
| System | Module | What Lavboard controls |
|---|---|---|
| DJI Mic Mini 2S | Packages/DJIMicMini2S |
Battery, hardware gain (-12 to +12 dB), mono, stereo or 4-track mode, noise cancellation, low cut, backup recording on the transmitters |
The receiver is recognised by its USB ID (2ca3:4015, or 2ca3:4115 in 4-track mode). Any other wireless receiver that shows up as a USB audio input still works as an ordinary input, without per-transmitter controls.
Want your system supported, such as a RØDE Wireless PRO or GO? A module can start out audio-only, just naming the transmitters' channels, and add controls once someone works out the receiver's protocol. See Adding a mic system.
You need Xcode 16 or later and XcodeGen (brew install xcodegen).
xcodegen generate
xcodebuild -project Lavboard.xcodeproj -scheme Lavboard -configuration Release -derivedDataPath build build
open build/Build/Products/Release/Lavboard.appBuilds are ad-hoc signed by default. To sign with your own Apple Development identity, which keeps the microphone permission across rebuilds, create Config/Local.xcconfig:
DEVELOPMENT_TEAM = YOURTEAMID
CODE_SIGN_IDENTITY = Apple Development
Run the tests with xcodebuild -project Lavboard.xcodeproj -scheme Lavboard test, and each mic system module's own tests with swift test --package-path Packages/<Module>.
- Allow microphone access when macOS asks. The app needs it to read the receiver's audio.
- Switch the receiver to 4-track (the banner offers it). Each mic then arrives on its own channel. The receiver restarts for a few seconds.
- On the Stream strip, click Set up to install the virtual mic. macOS asks for your password once, because audio drivers live in
/Library/Audio/Plug-Ins/HAL. Then pick Lavboard as the mic in your streaming app. - Pick a wired output on the Venue strip if you feed a PA.
- The first time you add app audio, macOS asks whether Lavboard may record it. If app audio stays silent, check System Settings > Privacy & Security > Screen & System Audio Recording.
- Mic systems: each module conforms to
MicSysteminPackages/MicSystemKit: it recognises its receiver's audio device, says which channel carries each transmitter, and reports optional capabilities (gain, battery, modes, settings). The app draws every control from those capabilities. - DJI control: the receiver exposes a vendor USB interface (
com.dji.mic, interface 4). Selecting alternate setting 1 opens two bulk endpoints that carry DJI's DUML protocol: status pushes for the receiver and each transmitter, and set-parameter commands. SeePackages/DJIMicMini2S. - Audio: the app builds a private aggregate device from the inputs your tracks use and the outputs. The receiver (or the first input, without one) is the clock master and every other device is drift-compensated, so mixing happens in one small-buffer CoreAudio callback. Bluetooth mics and devices without 48 kHz (many webcams) run on their own clock instead: each is captured separately and converted to 48 kHz by a windowed-sinc resampler that follows its clock drift (
App/Audio/AsyncSource.c). Their tracks run a little behind the others; the strip shows by how much. The mixer core is lock-free C (App/Audio/AudioCore.c). - App audio: a CoreAudio process tap (macOS 14.2 and later) captures one app's processes, including helpers such as a browser's web-content processes, or everything except Lavboard, OBS and Streamlabs, so the stream never feeds back into itself. Each tap runs in a small private aggregate device and goes through the same resampler as Bluetooth mics. When an app starts or stops playing, the running tap takes the new process list without stopping, so the mics never drop out.
- Recording: the audio callback writes into a lock-free ring buffer that a background thread drains to disk.
- Stream device: a virtual audio driver built from BlackHole, customised through
Driver/StreamDriverConfig.hwithout editing its source.
tools/ holds the Python and Swift scripts used to reverse-engineer the receiver, plus lavctl, which drives a debug build from the shell.
Bug reports and pull requests are welcome. See CONTRIBUTING.md for setup, adding a mic system, testing with a receiver and the protocol safety rules. Please report security issues privately as described in SECURITY.md.
DJI, DJI Mic and DJI Mimo are trademarks of SZ DJI Technology Co., Ltd. Lavboard is an independent project, not affiliated with or endorsed by DJI. It talks to the receiver over the same USB channel the DJI Mimo app uses through the phone adapter.
- usokawa/dji-mic-mo documented the Mic Mini parameter IDs and status offsets this app builds on.
- ShadowBitBasher/DJI-Mic-Control documented the protocol for earlier receivers.
- Sparkle (MIT) handles in-app updates.
- BlackHole by Existential Audio powers the stream device. It is GPL-3.0 licensed; the vendored copy and its license are in
Vendor/BlackHole.
Lavboard is free software, licensed under the GNU General Public License v3.0. Copyright (C) 2026 the Lavboard authors.
The GPL is what allows the app to bundle BlackHole: BlackHole may be used in apps that are themselves GPL-3.0. A version under any other license would need a commercial license from Existential Audio or a different virtual audio driver.