Share Facebook Twitter LinkedIn Pinterest Email The historic Hackney Empire – a unique 21st-century variety theatre in London – rolled out the red carpet for 3 days of 3D sound demonstrations by Astro Spatial Audio, hosted by 2B Heard. Photos courtesy of Astro Spatial Audio www.2b-heard.com www.astroaudio.eu www.k-array.com 2B Heard Astro Spatial Audio K-array