XAudio2 Audio effects

An audio effect is a object that takes incoming audio data, and performs some operation on the data before passing it on. Effect to perform a variety of the tasks, including adding reverb to an audio stream and monitoring peak volum E levels.

An audio effect is an object that takes input audio data and does some work on the data before the data is passed on. A sound effect can be used to perform a variety of tasks, including adding reverb to the audio stream and monitoring the volume peaks.

Effect Chains

any XAudio2 Voice can host a chain of audio effects. You can use a array of  xaudio2_effect_descriptor  structures to specify EFFECT Chains. Each descriptor contains a pointer to an effect object provided by the client. These objects must implement the Audio processing Object (APO) interfaces. See The xapo overview for More information about the APO model.

any XAudio2 Voice can hold an audio effect chain. You can use the

effect chains can be modified by the client dynamically (whilst the XAudio2 engine is Runnin g), effects can be enabled or disabled individually, and effect parameters can is changed-all without any interruption of The audio. Whenever any aspect of the effect graph changes, XAudio2 optimizes the graph again to avoid unnecessary processing. see  ixaudio2voice::seteffectchain , ixaudio2voice::enableeffect , and  ixaudio2voice::seteffectparameters .

effect chain can be dynamically modified by the client (when the XAudio2 engine is running), the effects can be independently enabled and disabled, And the effect parameters can be changed-none of this will have any effect on the audio. Whenever any part of the special effects diagram changes, XAudio2 will again optimize the effect map to avoid unnecessary processing. Reference: ixaudio2voice::seteffectchain ixaudio2voice::enableeffect and Ixaudio2voice:: Seteffectparameters

After an effect was attached to a XAudio2 voice, XAudio2 takes control of the effect, and the client should not do any F Urther calls to it. The simplest-to-ensure-is-to-release all pointers to the effect.

When attaching the effect to XAudio2 voice, XAudio2 takes over the effect, and the client should not make any further calls to it. The simplest way to ensure this is to release all pointers to the effects.

The effects in a given XAudio2 voice ' s effect chain must consume and produce floating-point audio at that voice ' s Processi Ng sample rate. The only aspect of the audio format they can change are the channel count (for example, a reverb effect can convert mono da TA to 5.1). The client can use theXaudio2_effect_descriptor.Outputchannelsfield to specify the number of channels so each effect should produce. The effect chain fails if any of the effects cannot fulfill these requirements, or if an effect produces a number of Chann Els that the next effect cannot handle. AnyIxaudio2voice::enableeffectOrixaudio2voice::D isableeffectCalls that cause the effect chain to stop fulfilling these requirements would fail.

The effects of a given XAUdio2 voice effect chain must consume and produce floating-point audio data at that Voice's processing sample rate. The only part of the audio format that they can change is the number of channels (for example, a reverb effect can convert mono data to 5.1-channel data). Clients can useXaudio2_effect_descriptor.Outputchannels< The span style= "color: #454545" >  section to specify the number of audio channels each effect should produce. If any of the effects do not fulfill these requirements then the effect chain will be invalidated, or the number of channels created by a special effect can not be processed next. Any &NBSP; ixaudio2voice::enableeffect &NBSP;OR&NBSP;

APO interfaces used in XAudio2 must be destructive. This means they all overwrite any data they find in their output buffers. Otherwise, the resulting audio might is incorrect because XAudio2 makes no guarantee that these buffers has been initiali Zed previously with silence.

The APO interface used in the XAudio2 must have a possible destruction. This means that they will always rewrite any data they find in their output buffers. Otherwise, the computed audio may be incorrect because XAudio2 does not guarantee that the buffers were not sound when they were previously initialized.

XAudio2 built-in Effects

The following table lists the set of built-in audio effects provided by XAudio2 and their creation methods.

The following table lists the set of built-in audio effects provided by XAudio2 and how they are created.

Effect	Creation Method
Reverb	Xaudio2createreverb
Volume Meter	Xaudio2createvolumemeter

for a example of creating and using an instance of a audio effect, see How to:create an Effect Chain.

For an instance of creating and using audio effects, see how to:create an Effect Chain.

Custom Effects in XAudio2

The Xapo API provides a framework for creating custom audio effects so can use in XAudio2. For the example of creating a custom effect with Xapo, see how To:create an Xapo.

Xapo Effect Library (XAPOFX)

xapofx provides an additional library of xapos and common mechanism for creating them . For the example of using XAPOFX with XAudio2, See how to:use xapofx in XAudio2.

XAPOFX provides an additional library of Xapos , and provides a common mechanism for creating them. For an example using XAPOFX and XAudio2, refer to how To:use XAPOFX in XAudio2.

XAudio2 Audio effects