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chrome.audio

This API is part of the deprecated Chrome Apps platform. Learn more about migrating your app.
Important: This API works only on ChromeOS
  • Description

    The chrome.audio API is provided to allow users to get information about and control the audio devices attached to the system. This API is currently only available in kiosk mode for ChromeOS.

  • Permissions
    audio
  • Availability
    Chrome 59+ ChromeOS only

Summary

Types

AudioDeviceInfo

Properties

  • deviceName

    string

    Device name.

  • deviceType

    Type of the device.

  • displayName

    string

    The user-friendly name (e.g. "USB Microphone").

  • id

    string

    The unique identifier of the audio device.

  • isActive

    boolean

    True if this is the current active device.

  • level

    number

    The sound level of the device, volume for output, gain for input.

  • stableDeviceId

    string optional

    The stable/persisted device id string when available.

  • streamType

    Stream type associated with this device.

DeviceFilter

Properties

  • isActive

    boolean optional

    If set, only audio devices whose active state matches this value will satisfy the filter.

  • streamTypes

    StreamType[] optional

    If set, only audio devices whose stream type is included in this list will satisfy the filter.

DeviceIdLists

Properties

  • input

    string[] optional

    List of input devices specified by their ID.

    To indicate input devices should be unaffected, leave this property unset.

  • output

    string[] optional

    List of output devices specified by their ID.

    To indicate output devices should be unaffected, leave this property unset.

DeviceProperties

Properties

  • level

    number optional

    The audio device's desired sound level. Defaults to the device's current sound level.

    If used with audio input device, represents audio device gain.

    If used with audio output device, represents audio device volume.

DeviceType

Available audio device types.

Type

"HEADPHONE"

,

"MIC"

,

"USB"

,

"BLUETOOTH"

,

"HDMI"

,

"INTERNAL_SPEAKER"

,

"INTERNAL_MIC"

,

"FRONT_MIC"

,

"REAR_MIC"

,

"KEYBOARD_MIC"

,

"HOTWORD"

,

"LINEOUT"

,

"POST_MIX_LOOPBACK"

,

"POST_DSP_LOOPBACK"

,

"ALSA_LOOPBACK"

,
or

"OTHER"

LevelChangedEvent

Properties

  • deviceId

    string

    ID of device whose sound level has changed.

  • level

    number

    The device's new sound level.

MuteChangedEvent

Properties

  • isMuted

    boolean

    Whether or not the stream is now muted.

  • streamType

    The type of the stream for which the mute value changed. The updated mute value applies to all devices with this stream type.

StreamType

Type of stream an audio device provides.

Type

"INPUT"

, or

"OUTPUT"

Methods

getDevices

chrome.audio.getDevices(
  filter?: DeviceFilter,
  callback: function,
)

Gets a list of audio devices filtered based on filter.

Parameters

  • filter

    DeviceFilter optional

    Device properties by which to filter the list of returned audio devices. If the filter is not set or set to {}, returned device list will contain all available audio devices.

  • callback

    function

    The callback parameter looks like: (devices: AudioDeviceInfo[]) => void

getMute

chrome.audio.getMute(
  streamType: StreamType,
  callback: function,
)

Gets the system-wide mute state for the specified stream type.

Parameters

  • streamType

    Stream type for which mute state should be fetched.

  • callback

    function

    The callback parameter looks like: (value: boolean) => void

    • value

      boolean

setActiveDevices

chrome.audio.setActiveDevices(
  ids: DeviceIdLists,
  callback: function,
)

Sets lists of active input and/or output devices.

Parameters

  • Specifies IDs of devices that should be active. If either the input or output list is not set, devices in that category are unaffected.

    It is an error to pass in a non-existent device ID.

  • callback

    function

    The callback parameter looks like: () => void

setMute

chrome.audio.setMute(
  streamType: StreamType,
  isMuted: boolean,
  callback?: function,
)

Sets mute state for a stream type. The mute state will apply to all audio devices with the specified audio stream type.

Parameters

  • streamType

    Stream type for which mute state should be set.

  • isMuted

    boolean

    New mute value.

  • callback

    function optional

    The callback parameter looks like: () => void

setProperties

chrome.audio.setProperties(
  id: string,
  properties: DeviceProperties,
  callback: function,
)

Sets the properties for the input or output device.

Parameters

  • id

    string

  • callback

    function

    The callback parameter looks like: () => void

Events

onDeviceListChanged

chrome.audio.onDeviceListChanged.addListener(
  callback: function,
)

Fired when audio devices change, either new devices being added, or existing devices being removed.

Parameters

onLevelChanged

chrome.audio.onLevelChanged.addListener(
  callback: function,
)

Fired when sound level changes for an active audio device.

Parameters

onMuteChanged

chrome.audio.onMuteChanged.addListener(
  callback: function,
)

Fired when the mute state of the audio input or output changes. Note that mute state is system-wide and the new value applies to every audio device with specified stream type.

Parameters