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The monitoring bus offers a 3D rendering of the spatialization buses, through headphones, using the binaural algorithm.

Unlike standard binaural buses, the monitoring bus doesn't spatialize the sources in binaural, but instead spatializes the algorithm’s loudspeakers.

To listen to the 3D binaural rendering of a bus, click on ‘MONITORING’ in the desired bus page. Several buses can be monitored at the same time.

Head Tracking via OSC

Head tracking systems can be connected to a binaural bus (including the monitoring bus) through OSC. These systems track the head orientation thanks to a small device (some iOS or Android apps offer such functionalities).

It allows keeping the audio scene at the same position around you, even when moving your head. This generally greatly helps with hearing the right localization for the sounds.

Monitoring Parameters


When activated, it attenuates the master level by -20 dB.


To configure a binaural bus, simply choose an HRTF File from the list. The "1040" HRTF file is provided by default with HOLOPHONIX as it is known to ensure good results for many people.

Different versions are available for the "1040" HRTF:

  • SOS16 (lower spectral quality, more CPU efficient),
  • SOS24 (intermediate spectral quality and CPU charge)
  • SOS32 (higher spectral quality, more CPU demanding)


The ITD (Interaural Time Difference) parameter allows you to adjust to your morphology to the interaural time difference that is due to the distance between your ears.


The orientation of the Binaural Listener can be adjusted with Yaw, Pitch, Roll, to rotate the entire audio scene. See rotation angles.