Sensaura

Lore & Background

Sensaura originated as a research project at Thorn EMI's Central Research Laboratories in Hayes, United Kingdom, in 1991. By 1998, it had licensed its 3D audio technology to major audio chip manufacturers including ESS Technology, Crystal Semiconductor/Cirrus Logic, and Yamaha, which together supplied 70% of the PC audio market at that time. Subsequent licensees included NVIDIA, Analog Devices, VIA Technologies, and C-Media Electronics. In 1993, Sensaura released a CD sampler disc titled 'beyond stereo...' containing four live-recorded tracks intended to demonstrate 3D sound from a two-channel stereo setup. Commercial recordings using Sensaura technology included Milla Jovovich's 'The Divine Comedy' (1994) and a recording of Mahler's Symphony No. 9 by Benjamin Zander and the Philharmonia Orchestra (1999).

Sensaura's 3D Positional Audio (S-3DPA) technology built upon Microsoft DirectSound3D API, offering HRTF-based 3D audio positioning with low CPU usage. Features included Virtual Ear (selectable HRTF profiles), Digital Ear (tuning HRTF libraries to an individual's ear shape via CAD model), MacroFX (near-field proximity effects), and ZoomFX (simulating sounds of a specific size). For speaker systems, Sensaura developed MultiDrive 5.1 and XTC cross-talk cancellation to create accurate 3D audio from 5.1 surround setups. The technology was also available as a middleware product called gameCODA for the Xbox, PlayStation 2, and GameCube.

In December 2003, Creative Technology bought the Sensaura business and IP portfolio. Sensaura continued as an R&D division within Creative, but after major staff reductions in March 2007 it ceased supplying audio technologies for PC sound cards and game consoles, focusing instead on other product areas including involvement with the OpenSL ES standard. Following further headcount reductions in 2008, remaining Sensaura engineers were absorbed into Creative's 3DLabs subsidiary. Prior to the acquisition, some employees left to form Sonaptic Ltd., which licensed Sensaura technology for 3D positional audio on mobile devices; Wolfson Microelectronics acquired Sonaptic in 2007.

Reader's Guide

Sensaura's significance lies in its widespread adoption across the PC audio market during the late 1990s and early 2000s. By licensing its 3D audio technology to chip manufacturers that supplied 70% of the PC audio market by 1998, Sensaura became a de facto standard for positional audio in games. Its technology shipped on over 150 million PCs and 24 million game consoles, including direct licensing for the first Microsoft Xbox hardware. The development of gameCODA middleware extended its reach to multiple console platforms. Sensaura's innovations such as MacroFX, ZoomFX, and Digital Ear represented attempts to improve the realism of virtual audio environments beyond basic HRTF processing. The company's legacy continued through its acquisition by Creative Technology and the subsequent spin-off Sonaptic, which brought 3D positional audio to mobile devices. The WinAmp spatial audio plugin, downloaded 18 million times, demonstrated consumer interest in enhanced audio experiences. Sensaura's technologies influenced later audio standards and middleware, and its engineering team contributed to the OpenSL ES standard after the company's absorption into Creative's subsidiaries.

Did You Know?

• The company released a CD sampler disc in 1993 called 'beyond stereo...' with four live-recorded tracks demonstrating 3D sound from two-channel stereo.
• Sensaura's Digital Ear technology created a CAD model of an individual's ear to tune HRTF filter libraries.
• Prior to Creative Technology's acquisition, some employees left to form Sonaptic Ltd., which specialized in 3D positional audio for mobile devices.