stemdeckapp/stemdeck

[!IMPORTANT]
macOS first launch (no code signing yet). After dragging StemDeck to Applications, clear the Gatekeeper quarantine flag or macOS will say the app is damaged:

xattr -dr com.apple.quarantine /Applications/StemDeck.app

Upgrading from alpha.9 or earlier? If after installing you still see an old version or are missing recent features, clear the cached runtime once and relaunch:

rm -rf ~/Library/Application\ Support/StemDeck/runtime ~/Library/Application\ Support/StemDeck/runtime.old

What's new in 0.7.0 Alpha 18

Export as MP4 (new)

• Export your mix as a video. Mute the vocals (or any stems) and export an MP4 that pairs your custom mix with the original picture. (#219)
  • Imported .mp4 files keep their original video, muxed losslessly with your mix.
  • YouTube imports download the real video stream (H.264, up to 720p) and mux it with your mix.
  • Pick MP4 from the export format toggle (WAV / MP3 / FLAC / MP4), then Export Mix. The MP4 option appears only for sources that have video — SoundCloud and plain audio files stay audio-only.

Linux: FFmpeg now installs automatically

• On Linux, StemDeck now downloads FFmpeg on first launch (matching Windows and macOS) instead of requiring sudo apt install ffmpeg. A system ffmpeg on your PATH is still used if present.

Fixes

• Your library no longer disappears. The desktop app no longer applies the 24-hour job cleanup to your personal library — your tracks persist until you delete them yourself (via Trash). Previously, reopening the app a day later (e.g. after installing an update) could purge a track's audio while leaving its library entry behind.

Other

• "Supporters" is now We Recommend, with new picks (Thomann, Analog4Lyfe, Empress Effects). (#228, #230)

Installing

• macOS: drop the .app into Applications and launch (run the xattr command above first).
• Windows: unzip the downloaded .zip, then run StemDeck.exe from the extracted folder.
• Linux: download the .tar.gz for your hardware, extract it, and run ./StemDeck. Install the WebKitGTK + GTK runtime prerequisites first (FFmpeg is fetched automatically on first launch):

  sudo apt install libwebkit2gtk-4.1-0 libgtk-3-0
  

  The NVIDIA build additionally needs a working NVIDIA driver such that nvidia-smi reports your GPU (the CUDA runtime itself is bundled — no separate CUDA toolkit install needed). If you have no NVIDIA GPU, use the CPU-only tarball.

Artifact build

• macOS arm64 and x64 DMGs and runtime packs were built and inspected on a macOS GitHub Actions runner before upload.

Artifact scan

• The Linux portable packages (CPU and NVIDIA) were scanned with ClamAV in CI before upload.

Artifact scan

• Windows portable packages were scanned with ClamAV in CI before upload.