Spatial Audio Software. BACCH Labs is the exclusive licensor of technology from Princeton University’s 3D Audio & Applied Acoustics (3D3A) Research Lab, including - BACCH for headphones and loudspeakers - Headphone externalization without the need for customization. We offer Commercial Software for consumer electronics, streaming, and high-end audio companies. Experience Lifelike Spatial Audio. Any App. Any Device. Any Content.