You can use ListenHub with many Pro Tools HDX systems, but there are important limitations.
Some HDX interfaces, for example, the Avid HD OMNI, cannot be used as a system audio output while Pro Tools is running.
In these cases, you may not be able to directly route system audio (from macOS or other apps) into ListenHub while Pro Tools is active.
What Causes These Limitations?
Certain Pro Tools HDX hardware:
Is dedicated exclusively to Pro Tools while the application is running.
Cannot appear as a shared Core Audio device for macOS system output at the same time.
This prevents ListenHub from receiving both system and DAW audio simultaneously via the HDX interface.
Workarounds
1. Use Pro Tools Audio Bridge & AUX I/O
If you are running Pro Tools 2022.9 or later:
Pro Tools includes Audio Bridge Core Audio devices and AUX I/O routing features.
These allow you to route audio from other applications into Pro Tools and monitor it alongside your DAW session.
Once routed into Pro Tools, you can send that mix into ListenHub for reference monitoring.
2. Use the ListenHub AAX-Native Plugin instead
If you cannot change Pro Tools' primary playback device due to I/O routing requirements or the use of AAX-DSP plugins, you can use the included ListenHub AAX-Native plugin instead.
Here's how to use the ListenHub AAX-Native plugin:
- Insert the ListenHub plugin on your Pro Tools Master Fader or mix bus.
- Open the ListenHub desktop application. A new input labelled Plugin will appear beneath DAW 1-2 and DAW 3-4.
- Start playback in Pro Tools and play audio from your reference source (for example, Spotify or Apple Music).
- Use the System and Plugin input buttons in ListenHub to quickly switch between your reference audio and DAW output for A/B comparison.
Next Steps
If you are unsure whether your HDX hardware supports ListenHub system audio output, you can Contact Sonnox Support for guidance. Let us know your Pro Tools version and HDX interface model so we can suggest the most reliable configuration.