Binaural audio plugin6/24/2023 ![]() Hence we do not consider it as a low-latency plugin and therefore it is not suitable for interactive input. The plugin is considered by the authors a production tool and, due to its time-frequency processing, requires audio buffer sizes of at least 1024 samples. This control can be used in cases where parametric processing sounds too aggressive, or if the user prefers some degree of increased localisation blur, offered by linear Ambisonic decoding. The “Linear-to-Parametric” control allows the user to mix the output between standard linear Ambisonic decoding and the COMPASS parametric decoding. However, with more balanced settings, such artefacts should become imperceptible. Note that the parametric processing can be quite aggressive, and if one pushes it to fully direct rendering in a complex multi-source sound scene with FOA signals only, artefacts can easily appear. When set in the middle, the two are balanced. The “Diffuse-to-Direct” control allows the user to give more prominence to the direct sound components (an effect similar to subtle dereverberation), or to the ambient component (an effect similar to emphasising reverberation in the recording). Mixing control between fully parametric decoding and linear Ambisonic decoding, in frequency bands.Balance control between the extracted direct sound components and the ambient component, in frequency bands.Headphone binaural monitoring of the loudspeaker outputs, with support for user-provided personalised binaural filters (HRTFs) in the SOFA format.User-specified loudspeaker angles for up to 64 channels, or alternatively, presets for popular 2D and 3D set-ups.The plugin offers the following functionality: The COMPASS decoder is a parametric decoder for first, second, and third-order Ambisonics to arbitrary loudspeaker setups. Note that the plugins are still work in progress and we expect to keep improving them in the future, however, we believe that they can already prove useful to users and creators. The VST plugins apply this framework to different spatial audio production tasks. In COMPASS, the ambient component is also spatial and can have directionality, contrary to previous models that force it to be isotropic. Here is a table of the COMPASS model compared to other published parametric techniques (note that M is the number of channels): The method is quite general in its model and estimates multiple direct sound components in every time-frequency block, and an ambient component capturing reverberation and other diffuse sounds. Sakari Tervo and Leo McCormack, and published in. Archontis Politis with contributions from Dr. The COMPASS framework has been developed by Dr. Furthermore, the spatial parameters allow flexible manipulation of the sound scene content in ways that are not possible with traditional Ambisonics processing. The parameters are then used to render or upmix the sound scene flexibly to any playback system, without the constraints of lower-order Ambisonics. Contrary to the time-invariant linear processing of Ambisonics, which does not consider the sound components that comprise the sound scene, parametric methods assume a sound-field model for the sound scene and track the model parameters in the Ambisonics recording, in both time and frequency. Parametric methods, such as Directional Audio Coding (DirAC) or HARPEX have gained notoriety recently for being able to achieve sharpness or envelopment beyond first or lower-order traditional Ambisonics playback, using the same lower-order Ambisonics signals. Sakari Tervo in the Acoustics Lab at Aalto University.ĬOMPASS is a framework for parametric spatial audio processing of sound scenes captured in the Ambisonics format. ![]() ![]() Plug-in descriptions #ĬOMPASS VSTs is a collection of flexible VST audio plug-ins for spatial audio production, manipulation, and reproduction, developed by Dr. Plug-in descriptions for the COMPASS suite. ![]()
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