v4.5.3 Release

Steam Audio SDK 4.5.3

• Fix iplSceneSaveOBJ to save the .mtl file when exporting an IPL_SCENETYPE_EMBREE scene.
• Fix iplSceneSaveOBJ to also export instanced meshes when exporting an IPL_SCENETYPE_DEFAULT scene.
• Fix crash in iplSimulatorRunPathing when changing scenes. (#303)
• Update API docs for custom ray tracer callbacks. (#319)
• Fix Embree build settings to allow instanced meshes to work again. (#322)
• Fix crash when IPLReflectionEffect and IPLSimulator are created with different number of channels. (#324)
• Merge the following pull requests:
  • Fix typo in command in build-instructions.rst (#304)
  • Fix broken link to build instructions in README.md (#310)
  • Set volume in getting-started.rst example (#309)
  • Use IPLuint8 instead of uint8_t in phonon.h (#315)
  • uint32_t -> IPLuint32 in phonon_version.h to avoid dependency on stdint.h (#325)
  • Add support for AVX on Linux (#327)
  • Fix get_dependencies.py failing to build flatbuffers on macOS (#332)
  • Fix incorrect validation (#333)

Steam Audio Unity Plugin 4.5.3

• Add SteamAudioManager.NotifyAudioListenerChangedTo(Transform transform) to notify Steam Audio that the listener has changed to a specific GameObject. (#323)
• Merge the following pull requests:
  • fix enterplaymodeoptions interpretation that would consider that the overrides are ticked in the editor, while it is not the case (#321)

Steam Audio Unreal Engine Plugin 4.5.3

• Fix crash when simulating pathing. (#265)
• Fix missing include in SteamAudioGeometryComponent.cpp. (#316)

Steam Audio FMOD Studio Plugin 4.5.3

No changes.

v4.5.2 Release

Steam Audio SDK 4.5.2

• This is the first open source release of the Steam Audio SDK source code.
• Fix NaNs emitted by the panning effect when outputting to quad, 5.1, or 7.1 speaker layouts if the azimuth calculated for the source direction ends up negative due to floating-point error. (#300)
• Fix bug where changing the IR duration at runtime (e.g. in Unity's play mode) to a value larger than the max duration configured at initialization would cause the reflection effect to emit garbage, due to a buffer overrun in the overlap-save convolution partitioner. (#300)
• Fix crash when initializing OpenCL and one of the installed OpenCL platforms is unable to create devices of the specified type.
• Fix incorrect value for IPL_CONTEXTFLAGS_ENABLEVALIDATION.

Steam Audio Unity Plugin 4.5.2

No changes.

Steam Audio Unreal Engine Plugin 4.5.2

No changes.

Steam Audio FMOD Studio Plugin 4.5.2

No changes.

v4.5.1 Release

Steam Audio SDK 4.5.1

• Fix crash in iplSceneCreate when embreeDevice is not zero-initialized but type is not IPL_SCENETYPE_EMBREE (and similar for Radeon Rays). (#294)
• Fix issue where simulating reflections with dynamic objects and more than 1 source would give incorrect results if the dynamic object moved with the sources and listener stationary. (#298)

Steam Audio Unity Plugin 4.5.1

• Performance improvement on SteamAudioManager.GetPerspectiveCorrection. (#296)
• Fix exception when a SteamAudioSource with curve-driven distance attenuation is destroyed while reflections simulation is running. (#297)

Steam Audio Unreal Engine Plugin 4.5.1

• Fix bug with occlusion/reflections not updating in Play-In-Editor (PIE) mode. (#293)

Steam Audio FMOD Studio Plugin 4.5.1

No changes.

v4.5.0 Release

Steam Audio SDK 4.5.0

• Add support for iOS. Steam Audio now supports iOS devices (including both iPhone and iPad) using 64-bit ARM processors and running iOS 11.0 or later.
• Add a "validation" mode to the API. When the flags field has the IPL_CONTEXTFLAGS_VALIDATION flag set when creating an IPLContext, all API functions will perform several additional checks and report errors. This incurs a potentially significant performance penalty, and should only be used to diagnose hard-to-reproduce issues.
• Fix crash when trying to bake pathing data in a probe batch that does not contain any probes.
• Fix issue in path simulation where the path visualization callback would not be called if path validation is disabled.

Steam Audio Unity Plugin 4.5.0

• Add support for iOS.
• Add support for API validation mode.
• Fix issue where Unity gets stuck in an infinite C# recompile loop if Steam Audio is imported alongside another plugin that modifies scripting defines. (#282)
• Fix the Baker so it looks for SteamAudioStaticMesh not only at the root of a scene. (#278)
• Fix the GetVertices method for a terrain. (#279)
• Allow Steam Audio to load but not run on unsupported platform or when STEAMAUDIO_ENABLED define symbol is not present. (#280)
• SteamAudioSource optimized to take the SteamAudioSettings singleton only once. (#284)
• Performance optimizations concerning calling mCurrentScene.Commit(); in LateUpdate (#281)

Steam Audio Unreal Engine Plugin 4.5.0

• Add support for iOS.
• Add support for API validation mode.

Steam Audio FMOD Studio Plugin 4.5.0

• Add support for iOS.

v4.4.1 Release

Steam Audio SDK 4.4.1

• Fix bug where pathing simulation outputs were not correctly initialized to zero.
• Fix bug where sample program emits silence instead of spatialized audio. (#271)
• Fix bug where direct effect incorrectly crossfades when called for the first time. (#224)

Steam Audio Unity Plugin 4.4.1

• Significant performance improvements when rendering pathing.
• Allow building a stub plugin on unsupported platforms. (#277)
• Configure the runtime assembly to run only on supported platforms. (#277)

Steam Audio Unreal Engine Plugin 4.4.1

• Significant performance improvements when rendering pathing.
• Fix crash when enabling real-time audio in the editor. (#206)
• Fix bug where reflections mix level parameter does not work.

Steam Audio FMOD Studio Plugin 4.4.1

• Significant performance improvements when rendering pathing.

v4.4.0 Release

Steam Audio SDK 4.4.0

• Update the definition of the pathRange parameter of IPLPathBakeSettings to now mean the maximum length that a path can have for it to be included in the baked data.
• Optimize the path effect significantly for the case where we want to immediately spatialize the output.
• Fix a potential crash when creating an IPLSimulator with only the IPL_SIMULATIONFLAGS_PATHING flag.
• Fix a potential crash when simulating pathing with multiple probe batches.
• Fix a bug where iplSourceGetOutputs did not set the numChannels or numSamples values unless a simulation completed successfully at least once.
• Fix a potential bug when finding valid probes around a source or listener.
• Fix unnecessary memory allocations when simulating pathing.

Steam Audio Unity Plugin 4.4.0

• Fix issue where calling Stop() and then Play() on an FMOD Event Emitter component caused Steam Audio Source to not correctly set parameters.
• Update to use new parameters added in Steam Audio FMOD Studio plugin v4.4.0.
• Update build scripts to add support for Visual Studio 2022.

Steam Audio Unreal Engine Plugin 4.4.0

• Update to use new parameters added in Steam Audio FMOD Studio plugin v4.4.0.
• Update build scripts to add support for Visual Studio 2022.

Steam Audio FMOD Studio Plugin 4.4.0

• Add a new parameter to the spatializer effect for passing IPLSource objects via integer-valued handles instead of pointers. The old, pointer-valued parameter is now deprecated. (#244)
• Fix issue where no audio is heard in the FMOD Studio editor if Apply HRTF to Direct is enabled. (#260)
• Update build scripts to add support for Visual Studio 2022.

v4.3.0 Release

Steam Audio SDK 4.3.0

• Add option for normalizing the volume of an HRTF dataset, so that binaural audio has similar volume regardless of direction.
• Add option for finding multiple hits when simulating transmission.
• Add callback for visualizing pathing results.
• Update panning effect for standard speaker layouts with >2 channels to use pairwise constant power panning, instead of first-order Ambisonics panning.
• Fix bug where passing an un-normalized direction vector to iplAmbisonicsEncodeEffectApply would result in output volume being scaled by the vector length. (#261)
• Fix bug in reverb baking where setting bakeBatchSize to 0 results in log spew + crash. (#181)
• Fix issues with cancelling pathing bakes and reporting the progress of pathing bakes.
• Fix bug where IPLSimulationFlags for pathing were not respected properly.

Steam Audio Unity Plugin 4.3.0

• Add support for HRTF volume normalization.
• Add support for finding multiple hits when simulating transmission.
• Disallow baking when using Unity's built-in ray tracer, since it is not performant enough for baking to be practical. (#200)
• Fix unexpected calls to GC.Alloc when using the IL2CPP scripting backend. (#178)
• Fix NullReferenceException thrown when the AudioListener is not present when the scene loads. (#229)
• Fix exceptions thrown when Domain Reload or Scene Reload are disabled. (#232)
• Fix memory leak in the Steam Audio Source component and Steam Audio Spatializer effect. (#262)

Steam Audio Unreal Engine Plugin 4.3.0

• Add support for HRTF volume normalization.
• Add support for finding multiple hits when simulating transmission.

Steam Audio FMOD Studio Plugin 4.3.0

No changes.

v4.2.0 Release

Steam Audio SDK 4.2.0

• Add support for loading SOFA files from in-memory buffers. This allows more flexibility in managing the packaging, distribution, and loading of SOFA data.
• Fix bug where calling iplSceneCommit after iplSceneLoad caused the loaded static meshes to be removed from the scene and destroyed. (#251)

Steam Audio Unity Plugin 4.2.0

• Add support for loading SOFA files from assets, rather than loose files in StreamingAssets.
• Move FMOD Studio plugin files (phonon_fmod.dll etc.) to the correct place in the Unity assets folder for FMOD Studio 2.2 or later. (#255)

Steam Audio Unreal Engine Plugin 4.2.0

• Add SOFA file support. SOFA files are loaded from .uasset files.

Steam Audio FMOD Studio Plugin 4.2.0

No changes.

v4.1.4 Release

Steam Audio SDK 4.1.4

• Add support for ARM64 (Apple Silicon) on macOS.

Steam Audio Unity Plugin 4.1.4

• Add support for ARM64 (Apple Silicon) on macOS.
• Add option for "Perspective Correction" when spatializing Audio Sources, which positions sound based on the screen-space position of the source, rather than the world-space position, and may improve localization in non-VR applications.

Steam Audio Unreal Engine Plugin 4.1.4

• Add support for ARM64 (Apple Silicon) on macOS.

Steam Audio FMOD Studio Plugin 4.1.4

• Add support for ARM64 (Apple Silicon) on macOS.

v4.1.3 Release

Steam Audio SDK 4.1.3

• Update to latest version of libmysofa.
• Fix a bug where using bilinear interpolation with some SOFA HRTFs would result in silence.
• Package debug symbols for Windows and Linux.

Steam Audio Unity Plugin 4.1.3

• Package debug symbols for Windows and Linux.
• Update build scripts to use Python 3.x.

Steam Audio Unreal Engine Plugin 4.1.3

• Add support for Unreal Engine 5.0 and 5.1.
• Fix default materials to be initialized correctly.
• Fix various editor warnings.
• Update build scripts to use Python 3.x.

Steam Audio FMOD Studio Plugin 4.1.3

• Package debug symbols for Windows and Linux.
• Update build scripts to use Python 3.x.