AMD TrueAudio

TrueAudio is the name given to AMD's ASIC intended to serve as dedicated co-processor for the calculations of computationally expensive advanced audio signal processing, like e.g. convolution reverberation effects and 3D audio effects. TrueAudio is integrated into some of the AMD GPUs and APUs available since 2013.

For the unrelated codec called True Audio, see TTA (codec).
AMD TrueAudio
Design firmAdvanced Micro Devices
IntroducedOctober 2013
TypeAudio acceleration
AMD TrueAudio is a kind of audio co-processor.
Block diagram of HiFi Audio Engine DSP, which TrueAudio is based on. Shows the 56-bit wide MAC unit.

Overview

TrueAudio is a DSP for audio based on Cadence Tensilica HiFi EP DSP with Tensilica Xtensa SP float support.[1]

AMD claimed that a few simple audio effects can use up to 14% of the CPU. Audiokinetic claimed that it is up to 10%.[2] Independent software vendors (ISV), such as game developers, can use what is called a Wwise audio plugin to offload such computations to the TrueAudio DSPs. The on-die TrueAudio DSPs provide a better "silicon area to computing power" ratio and "power consumption to computing power" ratio for audio processing than the CPU, effectively making it an audio acceleration unit. Any additional benefits of the TrueAudio DSPs, such as "better effects", have been severely criticized.[3]

On 18 March 2014, AnandTech evaluated AMD TrueAudio using the Thief video game.[4]

True Audio Next

A new version of TrueAudio, TrueAudio Next, was released with the Radeon RX 400 series GPUs in 2016. TrueAudio Next utilizes the GPU to simulate audio physics.[5] The move from a dedicated DSP to GPGPU breaks compatibility with the previous TrueAudio implementation.[6] The TrueAudio Next SDK was released as open source through AMD's GPUOpen suite in August 2016.[7] It also clarified that TrueAudio Next uses the GPU's ray-casting technology to do the audio computation, and can also reserve GCN compute units for lower latency.

Software support
Interfaces involved when offloading computations to AMD TrueAudio. Sound cards, AC'97/HDA-codec chips or audio over HDMI/DisplayPort are not affected. Neither are A3D, EAX or OpenAL.
Support for the AMD TrueAudio ASIC is contained in the Linux kernel device driver amdgpu.

AMD TrueAudio enables dedicated digital signal processing (DSP). Such dedicated audio processing horsepower is specifically for generating immersive soundscapes and saves CPU cycles that can be used for other game processing tasks such as AI and Physics.

The video games Murdered: Soul Suspect, Star Citizen, Thief and Lichdom: Battlemage (uses CryEngine) can be configured to use AMD TrueAudio if present.

There is an audio plug-in for Audiokinetic's Wwise (Wave Works Interactive Sound Engine) to off-load computation to the TrueAudio DSP(s). Wwise is available for Linux, OS X, Windows, PlayStation 4, Xbox One et al.

GenAudio's AstoundSound, a highly optimized collection of advanced DSP C/C++ software available as a library or a plugin for augmenting real-time audio engines on Linux, OS X, Windows as well as Android and iOS, can make use of AMD TrueAudio.[8] AstoundSound is also wrapped for several plug-in formats, such as RTAS and Wwise and has been integrated into several DSP chips. AstoundSound is described as fully programmable audio engine.[9][10]

Support for True Audio Next was added to the Steam Audio API in February 2018.[11] The latest version was updated Nov 2022, and includes support for Unity, Unreal, and FMOD.[12]

Driver support

AMD has retired the original AMD TrueAudio Technology support from Radeon Software Crimson Edition 16.40, and introduced a new way for developers to support AMD TrueAudio Technology like features with AMD TrueAudio Next. There is a beta cross-platform support since end of 2019[13] and in 2021 it's still a pull request[14] but now this branch configured as default and compiles on Windows, Linux, and MacOS using CMake.[15]

Availability

AMD TrueAudio is found on-die of select AMD graphics cards and APUs. A die can house multiple AMD TrueAudio DSP cores, each having 32KiB instruction and data caches and 8KiB of scratchpad memory for local operation.[16]

AMD TrueAudio SIP blocks are found on the dies of some GPUs of the AMD Radeon Rx 200 Series;[17] namely the Radeon R7 260, Radeon R7 260X, Radeon R9 285, Radeon R9 290, Radeon R9 290X and the Radeon R9 295X2, and in Kaveri and Carrizo-based APUs.[17] TrueAudio is also supported by the PlayStation 4 hardware.[18]

An I²S solution is also supported for SOCs.[19][20]

AMD True Audio Next is supported on RX 5000,[21] 6000,[22] and 7000[23] series GPUs.

See also

Other AMD SIP blocks

References
  1. "Everything You Wanted to Know About AMD TrueAudio". Maximum PC. 2013-10-08. Archived from the original on July 11, 2014. Retrieved 2014-07-06.
  2. "Wwise Convolution Reverb with TrueAudio". YouTube. 2013-11-21.
  3. "Do We Really Need AMD TrueAudio?". 2013-09-26. Retrieved 2014-07-06.
  4. "Evaluating AMD's TrueAudio and Mantle Technologies with Thief". AnandTech. 2014-03-18. Retrieved 2014-07-06.
  5. Stanley, Donny (29 June 2016). "Review: AMD Radeon RX 480 8GB – Polaris Finally Arrives!". Custom PC Review. Retrieved 1 July 2016.
  6. Shrout, Ryan (30 June 2016). "Podcast #406 - AMD RX 480 Review, Huawei MateBook, Steam Summer Sale, GTX 1060 and more!". PC Perspective. Retrieved 1 July 2016.
  7. Kampman, Jeff (17 August 2016). "AMD open-sources VR audio and video-acceleration SDKs". Tech Report. Retrieved 17 August 2016.
  8. "AstoundSound for Gaming". 2013-11-21.
  9. "AstoundSound – 3D-Audio-Demo by Genaudio" (in German).
  10. "キャリアアップする時の対応方法". Retrieved 18 April 2023.
  11. Manion, Wayne (6 February 2018). "Latest Steam Audio SDK beta adds AMD TrueAudio Next support". Tech Report. Retrieved 6 February 2018.
  12. "Release v4.1.2 Release · ValveSoftware/Steam-audio". GitHub.
  13. Larabel, Michael (2019-12-22). "AMD Radeon TrueAudio-Next Finally Going Cross-Platform With Linux Support". Phoronix. Retrieved 2021-07-02.
  14. "Beta cross platform by imatyushin · Pull Request #5 · GPUOpen-LibrariesAndSDKs/TAN". GitHub. Retrieved 2021-07-02.
  15. "Possible changes and updates? · Issue #12 · GPUOpen-LibrariesAndSDKs/TAN". GitHub. Retrieved 2021-07-02.
  16. "AMD A8-7600 Kaveri APU review - The Embedded GPU - HSA & hUMA". 2014-01-14.
  17. "A technical look at AMD's Kaveri architecture". SemiAccurate. 2014-01-15.
  18. Smith, Ryan (November 13, 2013). "PS4 Spec Update: Audio DSP Is Based On AMD's TrueAudio". AnandTech. Retrieved March 7, 2020.
  19. "[PATCH 10/12] ASoC: AMD: Add AMD ASoC ACP-I2S driver (V2)". Archived from the original on 2016-03-04. Retrieved 2015-09-15.
  20. "[PATCH 09/12] drm/amd: add ACP driver support (v4)". Lists.freedesktop.org. 9 July 2015. Retrieved 2022-09-01.
  21. "Product specifications". amd.com. Retrieved 18 April 2023.
  22. "Product specifications". amd.com. Retrieved 18 April 2023.
  23. "Product specifications". amd.com. Retrieved 18 April 2023.
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