AudioServer

Inherits: Object

Server interface for low-level audio access.

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.

Tutorials

• Audio buses

• Audio Device Changer Demo

• Audio Mic Record Demo

• Audio Spectrum Demo

Properties

Methods

Signals

• bus_layout_changed ( )

Emitted when the AudioBusLayout changes.

Enumerations

enum SpeakerMode:

• SPEAKER_MODE_STEREO = 0 —- Two or fewer speakers were detected.

• SPEAKER_SURROUND_31 = 1 —- A 3.1 channel surround setup was detected.

• SPEAKER_SURROUND_51 = 2 —- A 5.1 channel surround setup was detected.

• SPEAKER_SURROUND_71 = 3 —- A 7.1 channel surround setup was detected.

Property Descriptions

• int bus_count

Number of available audio buses.

• String capture_device

Name of the current device for audio input (see 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 "Default" will record audio on the system-wide default audio input. If an invalid device name is set, the value will be reverted back to "Default".

• String device

Name of the current device for audio output (see 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 "Default" will play audio on the system-wide default audio output. If an invalid device name is set, the value will be reverted back to "Default".

• float global_rate_scale

Scales the rate at which audio is played (i.e. setting it to 0.5 will make the audio be played twice as fast).

Method Descriptions

• void add_bus ( int at_position=-1 )

Adds a bus at at_position.

• void add_bus_effect ( int bus_idx, AudioEffect effect, int at_position=-1 )

Adds an AudioEffect effect to the bus bus_idx at at_position.

• Array capture_get_device_list ( )

Returns the names of all audio input devices detected on the system.

• AudioBusLayout generate_bus_layout ( ) const

Generates an AudioBusLayout using the available buses and effects.

• int get_bus_channels ( int bus_idx ) const

Returns the amount of channels of the bus at index bus_idx.

• AudioEffect get_bus_effect ( int bus_idx, int effect_idx )

Returns the AudioEffect at position effect_idx in bus bus_idx.

• int get_bus_effect_count ( int bus_idx )

Returns the number of effects on the bus at bus_idx.

• AudioEffectInstance get_bus_effect_instance ( int bus_idx, int effect_idx, int channel=0 )

Returns the AudioEffectInstance assigned to the given bus and effect indices (and optionally channel).

• int get_bus_index ( String bus_name ) const

Returns the index of the bus with the name bus_name.

• String get_bus_name ( int bus_idx ) const

Returns the name of the bus with the index bus_idx.

• float get_bus_peak_volume_left_db ( int bus_idx, int channel ) const

Returns the peak volume of the left speaker at bus index bus_idx and channel index channel.

• float get_bus_peak_volume_right_db ( int bus_idx, int channel ) const

Returns the peak volume of the right speaker at bus index bus_idx and channel index channel.

• String get_bus_send ( int bus_idx ) const

Returns the name of the bus that the bus at index bus_idx sends to.

• float get_bus_volume_db ( int bus_idx ) const

Returns the volume of the bus at index bus_idx in dB.

• Array get_device_list ( )

Returns the names of all audio devices detected on the system.

• float get_mix_rate ( ) const

Returns the sample rate at the output of the AudioServer.

• float get_output_latency ( ) const

Returns the audio driver’s output latency.

• SpeakerMode get_speaker_mode ( ) const

Returns the speaker configuration.

• float get_time_since_last_mix ( ) const

Returns the relative time since the last mix occurred.

• float get_time_to_next_mix ( ) const

Returns the relative time until the next mix occurs.

• bool is_bus_bypassing_effects ( int bus_idx ) const

If true, the bus at index bus_idx is bypassing effects.

• bool is_bus_effect_enabled ( int bus_idx, int effect_idx ) const

If true, the effect at index effect_idx on the bus at index bus_idx is enabled.

• bool is_bus_mute ( int bus_idx ) const

If true, the bus at index bus_idx is muted.

• bool is_bus_solo ( int bus_idx ) const

If true, the bus at index bus_idx is in solo mode.

• void lock ( )

Locks the audio driver’s main loop.

Note: Remember to unlock it afterwards.

• void move_bus ( int index, int to_index )

Moves the bus from index index to index to_index.

• void remove_bus ( int index )

Removes the bus at index index.

• void remove_bus_effect ( int bus_idx, int effect_idx )

Removes the effect at index effect_idx from the bus at index bus_idx.

• void set_bus_bypass_effects ( int bus_idx, bool enable )

If true, the bus at index bus_idx is bypassing effects.

• void set_bus_effect_enabled ( int bus_idx, int effect_idx, bool enabled )

If true, the effect at index effect_idx on the bus at index bus_idx is enabled.

• void set_bus_layout ( AudioBusLayout bus_layout )

Overwrites the currently used AudioBusLayout.

• void set_bus_mute ( int bus_idx, bool enable )

If true, the bus at index bus_idx is muted.

• void set_bus_name ( int bus_idx, String name )

Sets the name of the bus at index bus_idx to name.

• void set_bus_send ( int bus_idx, String send )

Connects the output of the bus at bus_idx to the bus named send.

• void set_bus_solo ( int bus_idx, bool enable )

If true, the bus at index bus_idx is in solo mode.

• void set_bus_volume_db ( int bus_idx, float volume_db )

Sets the volume of the bus at index bus_idx to volume_db.

• void swap_bus_effects ( int bus_idx, int effect_idx, int by_effect_idx )

Swaps the position of two effects in bus bus_idx.

• void unlock ( )

Unlocks the audio driver’s main loop. (After locking it, you should always unlock it.)