Plays a sound effect with directed sound effects, dampens with distance if needed, generates effect of hearable position in space. For greater realism, a low-pass filter is automatically applied to distant sounds. This can be disabled by setting [member attenuation_filter_cutoff_hz] to [code]20500[/code].
By default, audio is heard from the camera position. This can be changed by adding a [Listener] node to the scene and enabling it by calling [method Listener.make_current] on it.
See also [AudioStreamPlayer] to play a sound non-positionally.
[b]Note:[/b] Hiding an [AudioStreamPlayer3D] node does not disable its audio output. To temporarily disable an [AudioStreamPlayer3D]'s audio output, set [member unit_db] to a very low value like [code]-100[/code] (which isn't audible to human hearing).
Determines which [Area] layers affect the sound for reverb and audio bus effects. Areas can be used to redirect [AudioStream]s so that they play in a certain audio bus. An example of how you might use this is making a "water" area so that sounds played in the water are redirected through an audio bus to make them sound like they are being played underwater.
Dampens audio using a low-pass filter above this frequency, in Hz. To disable the dampening effect entirely, set this to [code]20500[/code] as this frequency is above the human hearing limit.
Decides if audio should get quieter with distance linearly, quadratically, logarithmically, or not be affected by distance, effectively disabling attenuation.
[b]Note:[/b] When setting this property, keep in mind that no validation is performed to see if the given name matches an existing bus. This is because audio bus layouts might be loaded after this property is set. If this given name can't be resolved at runtime, it will fall back to [code]"Master"[/code].
Decides in which step the [url=https://en.wikipedia.org/wiki/Doppler_effect]Doppler effect[/url] should be calculated.
[b]Note:[/b] Only effective if the current [Camera]'s [member Camera.doppler_tracking] property is set to a value other than [constant Camera.DOPPLER_TRACKING_DISABLED].
No dampening of loudness according to distance. The sound will still be heard positionally, unlike an [AudioStreamPlayer]. [constant ATTENUATION_DISABLED] can be combined with a [member max_distance] value greater than [code]0.0[/code] to achieve linear attenuation clamped to a sphere of a defined size.
Mix this audio in, even when it's out of range. This increases CPU usage, but keeps the sound playing at the correct position if the camera leaves and enters the [AudioStreamPlayer3D]'s [member max_distance] radius.
Pause this audio when it gets out of range. This decreases CPU usage, but will cause the sound to restart if the camera leaves and enters the [AudioStreamPlayer3D]'s [member max_distance] radius.
