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Can be used to track individual parameter changes to avoid costly computations when they remain constant This class is designed to use only the lower bit information of the parameter IDs Ambisonics configurations (corresponding to AkChannelConfig::eConfigType == AK_ChannelConfigType_Ambisonic). Convention: X points towards the front, and XYZ follow a right-hand rule, so Y is the side vector (pointing ...

AkChannelConfig

Wwise SDK

Wwise SDK/Classes

Create a 3rd order ambisonic configuration. cfg.SetAmbisonic(16); // pass in the number of spherical harmonics, (N+1)^2, where N is the ambisonics order. // Invalidate (usually means "As Parent") cfg.Clear(); Definition at line 443 of file AkSpeakerConfig.h. AkChannelConfigDefinition: AkSpeakerConfig.h:444 AkChannelConfig::SetAmbisonicAkForceInline void SetAmbisonic(AkUInt32 in_uNumChannels)Set ...

AkPlatformInitSettings

Wwise SDK

Wwise SDK/Classes

For example, if 25 input channels need to be mixed to a 5th-order-ambisonics (36-channel) speaker bed (generating 25*36=900 operations) the mix will be performed in hardware if this value is less than 900, but performed in software if this value is greater than or equal to 900. More... AkThreadProperties threadOpusDecoder Opus decoder threading properties. More... AkThreadProperties threadMotionSink ...

Ambisonic panning versus VBAP

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Wwise Help/Using sounds and motion to enhance gameplay/Defining positioning/Using ambisonics

In contrast, ambisonics has a constant energy spread regardless of the source direction and loudspeaker layout. The lower the ambisonic order, the greater the spread. First-order ambisonics are, therefore, very imprecise, while third-order ambisonics are relatively precise, although still imprecise compared with VBAP.Encoding of mono sources into an ambisonics bed can be used for aesthetic reasons.

Ambisonic component ordering

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Wwise Help/Using sounds and motion to enhance gameplay/Defining positioning/Using ambisonics

The two primary component ordering formats for ambisonics are Furse-Malham, commonly called FuMa, and Ambisonic Channel Number, commonly called ACN. As seen in the following image, the former uses a lettered notation that—following alphabetical order per grouping—starts with the W (omni) channel, moves to its lower right, then its lower left, and then its lower center; then it moves to the next order ...

Intermediate spatial representations for the purpose of 3D audio

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Wwise Help/Using sounds and motion to enhance gameplay/Defining positioning/Using ambisonics

The blog Ambisonics as an Intermediate Spatial Representation (for VR) explains in detail the concept of intermediate spatial (or 3D) representations. In summary, busses at the higher levels of your bus hierarchy should be configured such that they preserve 3D information so that it can be used to binauralize for headphones, or “downmix” (for lack of a better term) for speakers. This is especially ...

Setting up a binauralizer Effect on an ambisonic bus

Wwise Help

Wwise Help/Using sounds and motion to enhance gameplay/Defining positioning/Using ambisonics

You can use certain Effect plug-ins, such as Auro Headphone or Resonance Audio (installed through the Audiokinetic Launcher), to convert ambisonics to a stereo configuration. In this way, you can benefit from the ambisonics format as an intermediate 3D representation of sounds and then effectively downmix the signal before it reaches the final output.To set up a binauralizer Effect ...

3D Meter

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Wwise Help/Reference topics/Views/Meter

The 3D Meter mode provides a 3D spherical representation of the directionality of an ambisonic signal. It calculates the Peak level at every position on the sphere. A heatmap representation is then generated from each of the positions on the sphere. The 3D meter mode is currently only available on busses that have an ambisonics bus configuration. During the decoding process, gain factors are applied ...

Audio Objects and Bus Config

Wwise Audio Lab

Wwise Audio Lab/Information Nodes

Bus and output configurations, when combined with Audio Objects, present different sounding results.More Info:Blog Article: Using Ambisonics for Dynamic AmbiencesWwise Documentation: Using AmbisonicsBlog Article: How Audio Objects Improve Spatial AccuracyWwise Documentation: Understanding Object-Based Audio

About the Wwise Sample Project

Sample Project

Dialogue—A demonstration of how to create dialogue that changes dynamically according to actions in game. Ambisonics —A demonstration of the surround sound of ambisonics through the binauralization of an Audio Bus using the Auro Headphone Effect. Music—These examples demonstrate different techniques for arranging and implementing interactive game music using pre-rendered audio ...

3D positioning illustrated

Wwise Help

Wwise Help/Using sounds and motion to enhance gameplay/Defining positioning

Spread and relative emitter-listener rotation is identical, regardless of the configuration types.You can pan sources with standard configuration into ambisonic busses ("encode to ambisonics"), and vice-versa ("decode from ambisonics").ExamplesThe examples in the following pages illustrate various facets of the algorithm presented above: Effect of Spread Effect of orientation ...

Focus

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.../Using sounds and motion to enhance gameplay/Defining positioning/3D positioning illustrated

Focus, input channels always contribute to at least 2 output channels unless they are perfectly aligned.This issue does not apply with ambisonics panning, which, by design, already leaks across output channels, albeit uniformly. Therefore, Focus is ignored when the channel configuration of the source is ambisonics. Effective Panning of an Emitter Located 45 Degrees from the Listener's ...

Effect of Height Spread

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.../Using sounds and motion to enhance gameplay/Defining positioning/3D positioning illustrated

This is because ambisonics is a speaker-agnostic format, and the headphone or speaker setup on which it will be later decoded is unknown at the time of panning. If that setup turned out to be a planar speaker configuration, it would not benefit from Height Spread. However, ambisonics is a representation that is intrinsically smooth, and this smoothness should suffice to mitigate the artifacts that ...

Panning on a 3D configuration

Wwise Help

.../Using sounds and motion to enhance gameplay/Defining positioning/3D positioning illustrated

Note For context, reference the first example. When panning on a 3D channel configuration, meaning a configuration (such as 7.1.4 or ambisonics) that can represent sound coming from above and/or below, the virtual sources are disposed in the shape of spherical caps. The following figures show stereo and 4.0 sources with various Spread and Focus.Recall that 3D positioning only takes up to 7 input ...

Environments

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Wwise Help/Using sounds and motion to enhance gameplay/Defining positioning/Using ambisonics

Many of the same considerations discussed in Cinematic VR apply to Auxiliary Busses used for environmental Effects. The RoomVerb and AK Convolution Reverb Effects support ambisonics natively, however Matrix Reverb does not. You can use them on a stereo, 4.0, or greater bus, whether you want to use the front-back delays or not, and route them to ambisonic busses. Their output will be encoded to ambisonics ...

Soundseed Grain tips

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Wwise Help/Wwise plug-ins/Source plug-ins/Soundseed Grain

Although it is also very relevant to output, say, first order ambisonics, and mix it into a third order ambisonics bus.Set the Positioning mode to 3D Spatialization.Use random modulation with Azimuth and/or Elevation.You may use Spread to your liking (to fill the space for example). Make sure Spread is greater than 0 if your material is multichannel, otherwise each grain is treated as a point source ...

Glossary

Wwise Help

As such, it is typically used on mobile platforms.AmbisonicsA surround sound technique covering the horizontal plane as well as regions above and below the listener. By way of its B-format sound field representation, it works independently of speaker setups.ADSR (Attack-Decay-Sustain-Release)The shape of an envelope as defined by the given values of a sound's attack time (and curve, in Wwise), decay ...

Wwise SDK

Wwise SDK/Classes/Class Members

Wwise::Plugin::V1::UndoManager , ak_wwise_plugin_host_undo_manager_v1 commSystem : AkCommSettings Compute() : AK::FNVHash< HashParams > Compute3DPositioning() : AK::IAkMixerPluginContext ComputeAmbisonicsEncoding() : AK::IAkGlobalPluginContext ComputeId() : AK::Win32::Device ComputeLowerCase() : AK::FNVHash< HashParams > ComputePlanarVBAPGains() : AK::IAkMixerPluginContext ComputePositioning() ...

Wwise SDK

Wwise SDK/Classes/Class Members/Functions

Wwise::Plugin::V1::UndoManager Compute() : AK::FNVHash< HashParams > Compute3DPositioning() : AK::IAkMixerPluginContext ComputeAmbisonicsEncoding() : AK::IAkGlobalPluginContext ComputeId() : AK::Win32::Device ComputeLowerCase() : AK::FNVHash< HashParams > ComputePlanarVBAPGains() : AK::IAkMixerPluginContext ComputePositioning() : AK::IAkAudioDeviceEffectPluginContext , AK::IAkMixerPluginContext ...

Oriented Reverb

Wwise Audio Lab

Wwise Audio Lab/Information Nodes

Description:Late reverb playing from a 3D bus keeps its orientation with regard to the Room, which makes for a convincing sense of presence. This example showcases the AK Convolution Reverb plug-in using a first order ambisonics IR that purposely steers the energy in one direction. Note: The IR has been exaggerated to make the oriented reverberation effect more obvious.

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