The best virtual reality (VR) video games are not just visual quality. Developers know that good audio is needed to get the experience as immersive as possible. Valve is very aware of this, it launched the Steam Audio SDK beta last year. Today, the beta takes another step forward, integrating AMD TrueAudio Next Technology (TAN).
By adding TrueAudio Next technology, Valve's goal is to provide higher acoustic complexity and detail for VR content while greatly speeding up audio processing and improving overall performance. AMD's TrueAudio Next has two advanced features that maximize the system's audio performance; AMD Resource ReservaTIon allows developers to reserve a portion of GPU computing specifically for audio processing, 20-25% of GPU computing The unit is dedicated to tasks that can be enabled or disabled on a scene-by-scene basis.
The second feature comes in the form of a GPU-calculated convolution algorithm. This enables developers to use time-varying convolution reverbs to increase the acoustic complexity and detail in their video games and VR applications. Convolutional reverberation over time can simulate a wide range of acoustic phenomena and result in increased presence.
With these new features, developers can now choose to increase the number of audio sources, high-fidelity stereo sound reproduction (Ambisonics) commands to achieve indirect sound and impulse response (IR) length, while freeing up CPU resources to apply it to other Tasks such as physical simulation or AI. This also means that any sudden frame rate drop and stuttering should be avoided and audio failure.
More information can be found on the Steam blog, where Valve further explains in detail: "Steam Audio's support for TrueAudio Next does not limit Steam Audio to specific hardware or platforms. We want our support for TrueAudio Next. Encourage hardware and platform vendors to give developers more choices to balance audio workloads with graphics, physics and other workloads to help them create a better audio experience for their users."
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