PannerNode: positionZ property
positionZ property of the
PannerNode interface specifies the Z coordinate of the audio source's position in 3D Cartesian
coordinates, corresponding to the depth axis (behind-in front of the
listener). The complete vector is defined by the position of the audio source, given
positionZ), and the orientation of the audio source (that is, the direction in
which it's facing), given as (
Depending on the directionality of the sound (as specified using the attributes
codeOuterGain), the orientation of the
sound may alter the perceived volume of the sound as it's being played. If the sound
is pointing toward the listener, it will be louder than if the sound is pointed away
from the listener.
AudioParam contained by this property is read only; however, you
can still change the value of the parameter by assigning a new value to its
value is the Z coordinate of the audio
source's position, in 3D Cartesian coordinates.
The following example starts an oscillator and moves it in front of the listener after 1 second, behind the listener after 2 seconds, and back to the listener's position after 3 seconds. Note that in this case, the change will mainly affect the timbre and perceived volume of the sound.
const context = new AudioContext(); const osc = new OscillatorNode(context); const panner = new PannerNode(context); panner.panningModel = "HRTF"; panner.positionZ.setValueAtTime(1, context.currentTime + 1); panner.positionZ.setValueAtTime(-1, context.currentTime + 2); panner.positionZ.setValueAtTime(0, context.currentTime + 3); osc.connect(panner).connect(context.destination); osc.start(0);
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