Record individual audio stems from Wwise buses during playback. Each bus with the plugin produces a separate WAV file, making it easy to capture music, SFX, ambience, and dialogue as isolated tracks. An optional VST3 bridge lets you monitor any Wwise stem in real time inside a DAW.
The Wwise plugin captures audio passing through a bus and writes it to shared memory. The Python tool reads that memory and writes WAV files. The VST3 plugin reads the same memory and outputs audio into your DAW.
The Wwise plugin was built for Wwise 2025. It wasn't tested on previous versions. Please reach out if you need compatibility with a specific Wwise version.
Run StemRecorder_Setup.exe. It installs three things:
Stem Recorder tool : C:\Program Files\Kusa\StemRecorder\StemRecorder.exe
VST3 bridge : C:\Program Files\Common Files\VST3\WwiseMonitor.vst3
Wwise menu entry : %AppData%\Audiokinetic\Wwise\Add-ons\Commands\
The Wwise plugin is installed separately through the Audiokinetic Launcher:
1. Open the Audiokinetic Launcher and go to the Plug-ins tab.
2. Click Add from directory and browse to the StemRecorder_WwisePluginSetup folder.
3. Upgrade Wwise in Project for the Launcher to copy the plugin into your project (you will need to compile so the engine can use it).
After installation, "Stem Recorder" appears under the Kusa menu in Wwise.
1. Add the plugin to buses
1. Launch the Stem Recorder tool from the Kusa menu in Wwise (or run StemRecorder.exe directly).
2. In Wwise, select the buses you want to record.
3. In the Stem Recorder tool, click Add plugin on selected.
4. Build Wwise banks.
Each selected bus now has a Stem Recorder effect inserted on it.
2. Set a working directory
On the tool, click Edit next to the output path and choose a folder where recordings will be saved.
3. Record
1. Click Start Recording.
2. Play audio in your game or Wwise.
3. The console shows which streams are actively receiving audio.
4. Click Stop Recording when done.
4. Find your files
Recordings are saved in numbered session folders inside your working directory :
Working Directory/
Session_001/
Stem_Music.wav
Stem_SFX.wav
Stem_Ambience.wav
Session_002/
...
All stems in a session are padded to the same length so they line up perfectly when imported into a DAW.
Format: 32-bit float WAV
Sample rate: Matches Wwise (48 kHz)
Channels: Automatically detected. If only left and right channels contain audio, multichannel files are shrunk to stereo.
Alignment: All recorded stems in a session have the same duration.
Each bus with the Stem Recorder plugin has a stream name used to identify it. When using the tool to insert the plugin, this is "BusName", but you can set a custom name in the plugin's Identifier property in Wwise.
The stream name determines:
- The WAV filename (Stem_<StreamName>.wav)
- Which stream the VST3 bridge connects to
The VST3 plugin lets you hear a Wwise stem in real time inside any DAW that supports VST3.
Setup
1. Open your DAW and add WwiseMonitor as an effect on a track. Disable inputs for that track and arm it.
2. In the plugin window, type the stream name you want to monitor. It should be the same stream name as the Wwise plugin's Identifier property.
3. The status indicator turns green when connected.
4. Play audio in Wwise. The DAW track now outputs that stem's audio.
The Stem Recorder tool connects to Wwise through WAAPI (Wwise Authoring API) on ws://127.0.0.1:8080/waapi
- The status indicator shows WAAPI Connected (green) or WAAPI Disconnected (gray).
- The tool polls every 3 seconds and auto-connects when Wwise becomes available.
- You can start the tool before or after Wwise. It will connect automatically.
- WAAPI must be enabled in Wwise and correctly setup: Project > User Preferences > WAAPI section.
To remove all Stem Recorder plugins from your Wwise project:
1. Open the Stem Recorder tool.
2. Click Delete all plugins.
This removes every Stem Recorder effect instance from all buses.
Tool doesn't connect to Wwise
- Make sure WAAPI is enabled: Wwise > Project > User Preferences > Enable WAAPI.
- Check that Wwise is running and a project is open.
No audio being recorded
- Verify the plugin is inserted on the bus (check the Effects tab in Wwise).
- Make sure audio is actually playing through that bus.
- Make sure your banks are updated.
VST3 not showing in DAW
- Verify WwiseMonitor.vst3 exists in C:\Program Files\Common Files\VST3\.
- Rescan plugins in your DAW.
Run the uninstaller from Add/Remove Programs or the Start Menu shortcut. This removes:
- StemRecorder.exe (Tool)
- WwiseMonitor.vst3
- The Wwise menu entry
The Wwise plugin (bus effect) must be removed separately. You can use the Audiokinetic Launcher to do so.