The Grand Auditorium has a variable volume (between 8,330 m³ and 11,800 m³) achieved by the movable acoustic ceiling (2.5m height variation) and a movable stage enclosure. For the concert configuration, the ceiling goes up, the enclosure is installed on stage, and the occupied Reverberation Time (RT) is 1.5 seconds (middle frequencies), ideal for symphony concerts and other non-amplified music. For the stage configuration, the ceiling goes down and the normal scenery is installed on the stage, and the occupied RT becomes 1.1 seconds, ideal for opera and other stage productions requiring amplified sound. The hall's geometry provides a uniform sound distribution; it produces clarity of speech and richness of sound.

The Auditorium features a stage 18m across and 17.4m deep, and is completed with state-of-the-art lighting and sound equipment. Over the stage there is a grid system supporting 32 mechanical and 35 electrical counterweight bars plus an integrated collapsible acoustic panel. Below the stage there is a two-tier trap door extending the entire length of the stage, suitable for most stage-requirements.

In addition, the Auditorium is equipped with simultaneous interpretation booths which enable the interpretation of 6 languages concurrently.