godot/doc/classes/AudioServer.xml

<?xml version="1.0" encoding="UTF-8" ?>
<class name="AudioServer" inherits="Object" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
	<brief_description>
		Server interface for low-level audio access.
	</brief_description>
	<description>
		[AudioServer] is a low-level server interface for audio access. It is in charge of creating sample data (playable audio) as well as its playback via a voice interface.
	</description>
	<tutorials>
		<link title="Audio buses">$DOCS_URL/tutorials/audio/audio_buses.html</link>
		<link title="Audio Device Changer Demo">https://godotengine.org/asset-library/asset/525</link>
		<link title="Audio Mic Record Demo">https://godotengine.org/asset-library/asset/527</link>
		<link title="Audio Spectrum Demo">https://godotengine.org/asset-library/asset/528</link>
	</tutorials>
	<methods>
		<method name="add_bus">
			<return type="void" />
			<argument index="0" name="at_position" type="int" default="-1" />
			<description>
				Adds a bus at [code]at_position[/code].
			</description>
		</method>
		<method name="add_bus_effect">
			<return type="void" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="effect" type="AudioEffect" />
			<argument index="2" name="at_position" type="int" default="-1" />
			<description>
				Adds an [AudioEffect] effect to the bus [code]bus_idx[/code] at [code]at_position[/code].
			</description>
		</method>
		<method name="capture_get_device_list">
			<return type="Array" />
			<description>
				Returns the names of all audio input devices detected on the system.
				[b]Note:[/b] [member ProjectSettings.audio/enable_audio_input] must be [code]true[/code] for audio input to work. See also that setting's description for caveats related to permissions and operating system privacy settings.
			</description>
		</method>
		<method name="generate_bus_layout" qualifiers="const">
			<return type="AudioBusLayout" />
			<description>
				Generates an [AudioBusLayout] using the available buses and effects.
			</description>
		</method>
		<method name="get_bus_channels" qualifiers="const">
			<return type="int" />
			<argument index="0" name="bus_idx" type="int" />
			<description>
				Returns the amount of channels of the bus at index [code]bus_idx[/code].
			</description>
		</method>
		<method name="get_bus_effect">
			<return type="AudioEffect" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="effect_idx" type="int" />
			<description>
				Returns the [AudioEffect] at position [code]effect_idx[/code] in bus [code]bus_idx[/code].
			</description>
		</method>
		<method name="get_bus_effect_count">
			<return type="int" />
			<argument index="0" name="bus_idx" type="int" />
			<description>
				Returns the number of effects on the bus at [code]bus_idx[/code].
			</description>
		</method>
		<method name="get_bus_effect_instance">
			<return type="AudioEffectInstance" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="effect_idx" type="int" />
			<argument index="2" name="channel" type="int" default="0" />
			<description>
				Returns the [AudioEffectInstance] assigned to the given bus and effect indices (and optionally channel).
			</description>
		</method>
		<method name="get_bus_index" qualifiers="const">
			<return type="int" />
			<argument index="0" name="bus_name" type="String" />
			<description>
				Returns the index of the bus with the name [code]bus_name[/code].
			</description>
		</method>
		<method name="get_bus_name" qualifiers="const">
			<return type="String" />
			<argument index="0" name="bus_idx" type="int" />
			<description>
				Returns the name of the bus with the index [code]bus_idx[/code].
			</description>
		</method>
		<method name="get_bus_peak_volume_left_db" qualifiers="const">
			<return type="float" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="channel" type="int" />
			<description>
				Returns the peak volume of the left speaker at bus index [code]bus_idx[/code] and channel index [code]channel[/code].
			</description>
		</method>
		<method name="get_bus_peak_volume_right_db" qualifiers="const">
			<return type="float" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="channel" type="int" />
			<description>
				Returns the peak volume of the right speaker at bus index [code]bus_idx[/code] and channel index [code]channel[/code].
			</description>
		</method>
		<method name="get_bus_send" qualifiers="const">
			<return type="String" />
			<argument index="0" name="bus_idx" type="int" />
			<description>
				Returns the name of the bus that the bus at index [code]bus_idx[/code] sends to.
			</description>
		</method>
		<method name="get_bus_volume_db" qualifiers="const">
			<return type="float" />
			<argument index="0" name="bus_idx" type="int" />
			<description>
				Returns the volume of the bus at index [code]bus_idx[/code] in dB.
			</description>
		</method>
		<method name="get_device_list">
			<return type="Array" />
			<description>
				Returns the names of all audio devices detected on the system.
			</description>
		</method>
		<method name="get_mix_rate" qualifiers="const">
			<return type="float" />
			<description>
				Returns the sample rate at the output of the [AudioServer].
			</description>
		</method>
		<method name="get_output_latency" qualifiers="const">
			<return type="float" />
			<description>
				Returns the audio driver's output latency. This can be expensive, it is not recommended to call this every frame.
			</description>
		</method>
		<method name="get_speaker_mode" qualifiers="const">
			<return type="int" enum="AudioServer.SpeakerMode" />
			<description>
				Returns the speaker configuration.
			</description>
		</method>
		<method name="get_time_since_last_mix" qualifiers="const">
			<return type="float" />
			<description>
				Returns the relative time since the last mix occurred.
			</description>
		</method>
		<method name="get_time_to_next_mix" qualifiers="const">
			<return type="float" />
			<description>
				Returns the relative time until the next mix occurs.
			</description>
		</method>
		<method name="is_bus_bypassing_effects" qualifiers="const">
			<return type="bool" />
			<argument index="0" name="bus_idx" type="int" />
			<description>
				If [code]true[/code], the bus at index [code]bus_idx[/code] is bypassing effects.
			</description>
		</method>
		<method name="is_bus_effect_enabled" qualifiers="const">
			<return type="bool" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="effect_idx" type="int" />
			<description>
				If [code]true[/code], the effect at index [code]effect_idx[/code] on the bus at index [code]bus_idx[/code] is enabled.
			</description>
		</method>
		<method name="is_bus_mute" qualifiers="const">
			<return type="bool" />
			<argument index="0" name="bus_idx" type="int" />
			<description>
				If [code]true[/code], the bus at index [code]bus_idx[/code] is muted.
			</description>
		</method>
		<method name="is_bus_solo" qualifiers="const">
			<return type="bool" />
			<argument index="0" name="bus_idx" type="int" />
			<description>
				If [code]true[/code], the bus at index [code]bus_idx[/code] is in solo mode.
			</description>
		</method>
		<method name="lock">
			<return type="void" />
			<description>
				Locks the audio driver's main loop.
				[b]Note:[/b] Remember to unlock it afterwards.
			</description>
		</method>
		<method name="move_bus">
			<return type="void" />
			<argument index="0" name="index" type="int" />
			<argument index="1" name="to_index" type="int" />
			<description>
				Moves the bus from index [code]index[/code] to index [code]to_index[/code].
			</description>
		</method>
		<method name="remove_bus">
			<return type="void" />
			<argument index="0" name="index" type="int" />
			<description>
				Removes the bus at index [code]index[/code].
			</description>
		</method>
		<method name="remove_bus_effect">
			<return type="void" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="effect_idx" type="int" />
			<description>
				Removes the effect at index [code]effect_idx[/code] from the bus at index [code]bus_idx[/code].
			</description>
		</method>
		<method name="set_bus_bypass_effects">
			<return type="void" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="enable" type="bool" />
			<description>
				If [code]true[/code], the bus at index [code]bus_idx[/code] is bypassing effects.
			</description>
		</method>
		<method name="set_bus_effect_enabled">
			<return type="void" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="effect_idx" type="int" />
			<argument index="2" name="enabled" type="bool" />
			<description>
				If [code]true[/code], the effect at index [code]effect_idx[/code] on the bus at index [code]bus_idx[/code] is enabled.
			</description>
		</method>
		<method name="set_bus_layout">
			<return type="void" />
			<argument index="0" name="bus_layout" type="AudioBusLayout" />
			<description>
				Overwrites the currently used [AudioBusLayout].
			</description>
		</method>
		<method name="set_bus_mute">
			<return type="void" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="enable" type="bool" />
			<description>
				If [code]true[/code], the bus at index [code]bus_idx[/code] is muted.
			</description>
		</method>
		<method name="set_bus_name">
			<return type="void" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="name" type="String" />
			<description>
				Sets the name of the bus at index [code]bus_idx[/code] to [code]name[/code].
			</description>
		</method>
		<method name="set_bus_send">
			<return type="void" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="send" type="String" />
			<description>
				Connects the output of the bus at [code]bus_idx[/code] to the bus named [code]send[/code].
			</description>
		</method>
		<method name="set_bus_solo">
			<return type="void" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="enable" type="bool" />
			<description>
				If [code]true[/code], the bus at index [code]bus_idx[/code] is in solo mode.
			</description>
		</method>
		<method name="set_bus_volume_db">
			<return type="void" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="volume_db" type="float" />
			<description>
				Sets the volume of the bus at index [code]bus_idx[/code] to [code]volume_db[/code].
			</description>
		</method>
		<method name="swap_bus_effects">
			<return type="void" />
			<argument index="0" name="bus_idx" type="int" />
			<argument index="1" name="effect_idx" type="int" />
			<argument index="2" name="by_effect_idx" type="int" />
			<description>
				Swaps the position of two effects in bus [code]bus_idx[/code].
			</description>
		</method>
		<method name="unlock">
			<return type="void" />
			<description>
				Unlocks the audio driver's main loop. (After locking it, you should always unlock it.)
			</description>
		</method>
	</methods>
	<members>
		<member name="bus_count" type="int" setter="set_bus_count" getter="get_bus_count" default="1">
			Number of available audio buses.
		</member>
		<member name="capture_device" type="String" setter="capture_set_device" getter="capture_get_device" default="&quot;Default&quot;">
			Name of the current device for audio input (see [method capture_get_device_list]). On systems with multiple audio inputs (such as analog, USB and HDMI audio), this can be used to select the audio input device. The value [code]"Default"[/code] will record audio on the system-wide default audio input. If an invalid device name is set, the value will be reverted back to [code]"Default"[/code].
			[b]Note:[/b] [member ProjectSettings.audio/enable_audio_input] must be [code]true[/code] for audio input to work. See also that setting's description for caveats related to permissions and operating system privacy settings.
		</member>
		<member name="device" type="String" setter="set_device" getter="get_device" default="&quot;Default&quot;">
			Name of the current device for audio output (see [method get_device_list]). On systems with multiple audio outputs (such as analog, USB and HDMI audio), this can be used to select the audio output device. The value [code]"Default"[/code] will play audio on the system-wide default audio output. If an invalid device name is set, the value will be reverted back to [code]"Default"[/code].
		</member>
		<member name="global_rate_scale" type="float" setter="set_global_rate_scale" getter="get_global_rate_scale" default="1.0">
			Scales the rate at which audio is played (i.e. setting it to [code]0.5[/code] will make the audio be played twice as fast).
		</member>
	</members>
	<signals>
		<signal name="bus_layout_changed">
			<description>
				Emitted when the [AudioBusLayout] changes.
			</description>
		</signal>
	</signals>
	<constants>
		<constant name="SPEAKER_MODE_STEREO" value="0" enum="SpeakerMode">
			Two or fewer speakers were detected.
		</constant>
		<constant name="SPEAKER_SURROUND_31" value="1" enum="SpeakerMode">
			A 3.1 channel surround setup was detected.
		</constant>
		<constant name="SPEAKER_SURROUND_51" value="2" enum="SpeakerMode">
			A 5.1 channel surround setup was detected.
		</constant>
		<constant name="SPEAKER_SURROUND_71" value="3" enum="SpeakerMode">
			A 7.1 channel surround setup was detected.
		</constant>
	</constants>
</class>