Important
🤖 This entire project was written by Claude — Anthropic's Claude Opus 4.8 — working in Claude Code. Every line of source, the build system, the docs, and this README were authored by the model under human direction. Keep that in mind when reading, reusing, or auditing the code.
- Real knobs. Plug in a MIDI controller (faders, pads — e.g. an AKAI MPD218) and you get a physical remote for your sound: ride your mic level, balance it against your desktop audio, mute either one instantly — without alt-tabbing or digging through menus.
- Be heard. Bring your computer's audio into a call when you present. Sharing a demo, a tutorial, or a video clip and want people to actually hear it, not just see it? Soundboard blends your mic and your desktop audio and feeds the mix into the meeting as a normal microphone.
It's the audio mixing console I reach for every day: full, hands-on control of what I hear and what everyone on the call hears, straight from the hardware.
A software + hardware audio mixing console for macOS. A physical MIDI control
surface (faders/buttons) drives a live mix: the app captures your microphone and
everything your Mac plays, blends them in software, and feeds the result to a
from-scratch virtual loopback device (so any app/recorder can pick up the mix),
to an optional monitor output (so you can hear it), and to an optional .wav
recording. Transport keys (Play/Pause, Next, Prev) and every fader/mute are
MIDI-assignable.
Everything here is written from scratch — no forks of BlackHole, deej, etc.
| Console | Menu bar |
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- Download the latest
Soundboard-x.y.pkgfrom the Releases page. - Double-click it and follow the installer (it installs
Soundboard.appto/Applicationsand the loopback driver into the system, then restarts the audio daemon so the virtual device appears immediately). - Launch Soundboard. On first run it requests microphone, system-audio capture, and (optionally) accessibility permissions — these are required to capture sources and post media keys.
Requires Xcode, mise, and your Apple Developer Team ID.
The driver loads inside coreaudiod, so it must be code-signed.
brew install mise
mise run templates # vendor the xcodegen-templates into ./xcodegen-templates
cp .envrc.default .envrc # set DEVELOPMENT_TEAM (your Apple Developer Team ID)
make # generate every module's project + the workspace
make open # open Soundboard.xcworkspace in Xcode
make test # run the shared-memory ring + protocol unit tests
make pkg # build a signed, notarized .pkg into dist/Full setup (direnv, signing identities, every make target) is in
docs/building.md.
- Architecture — how capture → mix → loopback/monitor/record works, the modules, control flow, and the macOS constraints behind the design.
- Building — toolchain, Team ID, signing identities,
maketargets. - Releasing — building, notarizing, and publishing a signed
.pkg. - Protocol and SHMEM — the driver↔app HAL protocol and the shared-memory ring contract.
- Zipper-noise fix — the per-sample fader gain smoothing and the signal theory behind it.
- Contributing — how to get a clean build and submit changes.
Licensed under the Apache License 2.0. © 2026 Boris Vanin.
The code in this repository was written by Anthropic's Claude Opus 4.8 via Claude Code, under human direction.