Queries the audio configurations of a scene.

Usage note

This operation supports querying the audio configurations of a specific scene by its scene ID.

QPS limit

A single user can perform a maximum of 15 queries per second (QPS). Throttling is triggered when the number of calls per second exceeds the QPS limit. The throttling may affect your business. Thus, we recommend that you observe the QPS limit on this operation. For more information about what a single user means and the QPS details, see QPS limit on an API operation in ApsaraVideo Live.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes DescribeCasterSceneAudio

The operation that you want to perform. Set the value to DescribeCasterSceneAudio.

CasterId String Yes 97df6b7f-3490-47d2-ac50-88338765****

The ID of the production studio.

If you create a production studio through the CreateCaster interface, check the value of the CasterId parameter in the response.

If you create a production studio through the ApsaraVideo Live Console, log in to the console, then check the ID of the production studio through the following path:

Production Studios > Production Studio Management

Note The CasterId is reflected in the Name column on the Production Studio Management page.
SceneId String Yes 97df6b7f-3490-47d2-ac50-88339087****

The ID of the scene. For more information about the scenes, see Query the scenes of production studios.

RegionId String No cn-shanghai

The ID of the region.

Response parameters

Parameter Type Example Description
AudioLayers Array of AudioLayer

The configurations of the audio layer.

FixedDelayDuration Integer 2000

The fixed delay of the audio layer. Unit: milliseconds.

ValidChannel String all

The valid voice channels of the audio layer. Valid values:

  • left: the left channel.
  • right: the right channel.
  • all: both the left and right channels. This is the default value.
VolumeRate Float 1

The volume of the audio layer.

CasterId String 97df6b7f-3490-47d2-ac50-88338765****

The ID of the production studio.

FollowEnable Integer 1

Indicates whether audio follow video (AFV) is enabled. By default, AFV is enabled. Valid values:

  • 0: the audio mixing mode.
  • 1: the AFV mode.
MixList List RV01

The location ID of the audio layer in the production studio. The audio layers specified by this parameter are in the same order as those specified by the AudioLayers parameter.

RequestId String 98745637-3490-47d2-ac50-883387567098

The ID of the request.


Sample requests

&<Common request parameters>

Sample success responses

XML format


JSON format

    "RequestId": "97df6b7f-3490-47d2-ac50-883387654365",
    "FollowEnable": 1,
    "MixList": [
    "VideoFormat": [
            "VolumnRate": 1,
            "FixedDelayDuration": 2000,
            "ValidChannel": "all"    

Error codes

For a list of error codes, visit the API Error Center.