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AudioStreamPlayer

Inherits: Node < Object

A node for audio playback.

Description

The AudioStreamPlayer node plays an audio stream non-positionally. It is ideal for user interfaces, menus, or background music.

To use this node, stream needs to be set to a valid AudioStream resource. Playing more than one sound at the time is also supported, see max_polyphony.

If you need to play audio at a specific position, use AudioStreamPlayer2D or AudioStreamPlayer3D instead.

Tutorials

Properties

bool

autoplay

false

StringName

bus

&"Master"

int

max_polyphony

1

MixTarget

mix_target

0

float

pitch_scale

1.0

bool

playing

false

AudioStream

stream

bool

stream_paused

false

float

volume_db

0.0

Methods

float

get_playback_position()

AudioStreamPlayback

get_stream_playback()

bool

has_stream_playback()

void

play(from_position: float = 0.0)

void

seek(to_position: float)

void

stop()

Signals

finished()

Emitted when a sound finishes playing without interruptions. This signal is not emitted when calling stop, or when exiting the tree while sounds are playing.

Enumerations

enum MixTarget:

MixTarget MIX_TARGET_STEREO = 0

The audio will be played only on the first channel. This is the default.

MixTarget MIX_TARGET_SURROUND = 1

The audio will be played on all surround channels.

MixTarget MIX_TARGET_CENTER = 2

The audio will be played on the second channel, which is usually the center.

Property Descriptions

bool autoplay = false

  • void set_autoplay(value: bool)

  • bool is_autoplay_enabled()

If true, this node calls play when entering the tree.

StringName bus = &"Master"

The target bus name. All sounds from this node will be playing on this bus.

Note: At runtime, if no bus with the given name exists, all sounds will fall back on "Master". See also AudioServer.get_bus_name.

int max_polyphony = 1

  • void set_max_polyphony(value: int)

  • int get_max_polyphony()

The maximum number of sounds this node can play at the same time. Calling play after this value is reached will cut off the oldest sounds.

MixTarget mix_target = 0

The mix target channels, as one of the MixTarget constants. Has no effect when two speakers or less are detected (see SpeakerMode).

float pitch_scale = 1.0

  • void set_pitch_scale(value: float)

  • float get_pitch_scale()

The audio's pitch and tempo, as a multiplier of the stream's sample rate. A value of 2.0 doubles the audio's pitch, while a value of 0.5 halves the pitch.

bool playing = false

If true, this node is playing sounds. Setting this property has the same effect as play and stop.

AudioStream stream

The AudioStream resource to be played. Setting this property stops all currently playing sounds. If left empty, the AudioStreamPlayer does not work.

bool stream_paused = false

  • void set_stream_paused(value: bool)

  • bool get_stream_paused()

If true, the sounds are paused. Setting stream_paused to false resumes all sounds.

Note: This property is automatically changed when exiting or entering the tree, or this node is paused (see Node.process_mode).

float volume_db = 0.0

  • void set_volume_db(value: float)

  • float get_volume_db()

Volume of sound, in decibel. This is an offset of the stream's volume.

Note: To convert between decibel and linear energy (like most volume sliders do), use @GlobalScope.db_to_linear and @GlobalScope.linear_to_db.

Method Descriptions

float get_playback_position()

Returns the position in the AudioStream of the latest sound, in seconds. Returns 0.0 if no sounds are playing.

Note: The position is not always accurate, as the AudioServer does not mix audio every processed frame. To get more accurate results, add AudioServer.get_time_since_last_mix to the returned position.

AudioStreamPlayback get_stream_playback()

Returns the latest AudioStreamPlayback of this node, usually the most recently created by play. If no sounds are playing, this method fails and returns an empty playback.

bool has_stream_playback()

Returns true if any sound is active, even if stream_paused is set to true. See also playing and get_stream_playback.

void play(from_position: float = 0.0)

Plays a sound from the beginning, or the given from_position in seconds.

void seek(to_position: float)

Restarts all sounds to be played from the given to_position, in seconds. Does nothing if no sounds are playing.

void stop()

Stops all sounds from this node.

User-contributed notes

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