Spatial audio basics.

Short answer:

Spatial audio lets you place and move audio objects within a defined space, so sound appears to come from specific locations rather than from the loudspeakers. In professional (B2B) contexts it improves audio imaging (sound matches what people see) and can also create virtual acoustics that make one space sound like another.

Detailed answer:

What it does

Spatial audio treats each source as an “object” that can be positioned and moved. This can make amplified sound (actors, presenters, instruments) feel naturally located to where it appears visually, reducing the perception that sound is coming from the PA.

Why it matters

Common drivers are better intelligibility and realism for live performance, improved immersion for visitor experiences, and more engaging corporate/education presentations.

Typical uses

Live performance for improved imaging and tracking; immersive experiences for 360° movement and alignment with visual canvases; corporate/education for presenter placement and engagement.

Short answer:

Traditional formats are channel-based (fixed playback channels like stereo or 5.1). Object-based systems map each source individually to the loudspeaker array, allowing more flexible loudspeaker layouts and more precise placement without strict format rules.

Detailed answer:

Channel-based vs object-based

Channel-based mixes are summed into a fixed number of playback channels, and listener position plus loudspeaker layout strongly determine the perceived image. Object-based systems map each object’s properties directly to the loudspeaker array.

Flexibility

Because object-based systems are (within reason) agnostic to loudspeaker count and placement, they can support more varied deployments compared to strict surround layouts.

Integration

Object-based rendering can integrate with show control and tracking workflows (e.g., via OSC), enabling real-time movement and placement.

Short answer:

The required number depends on room size, coverage goal (e.g., 180° vs 360°), and the “resolution” you need for accurate object placement. More loudspeakers generally increase resolution by reducing gaps and allowing finer movement.

Detailed answer:

Key sizing factors

Consider: (1) audience/listening area size, (2) desired coverage angle, and (3) placement accuracy required for the experience.

Placement principle

Place loudspeakers around the audience or listening area so objects can be localized correctly while still meeting SPL and coverage requirements.

Resolution trade-off

Increasing loudspeaker count typically improves placement accuracy by closing gaps between sources.