# ChannelDefinition
<a name="API_streaming_ChannelDefinition"></a>

Makes it possible to specify which speaker is on which audio channel. For example, if your agent is the first participant to speak, you would set `ChannelId` to `0` (to indicate the first channel) and `ParticipantRole` to `AGENT` (to indicate that it's the agent speaking).

## Contents
<a name="API_streaming_ChannelDefinition_Contents"></a>

 ** ChannelId **   <a name="transcribe-Type-streaming_ChannelDefinition-ChannelId"></a>
Specify the audio channel you want to define.  
Type: Integer  
Valid Range: Minimum value of 0. Maximum value of 1.  
Required: Yes

 ** ParticipantRole **   <a name="transcribe-Type-streaming_ChannelDefinition-ParticipantRole"></a>
Specify the speaker you want to define. Omitting this parameter is equivalent to specifying both participants.  
Type: String  
Valid Values: `AGENT | CUSTOMER`   
Required: Yes

## See Also
<a name="API_streaming_ChannelDefinition_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/transcribe-streaming-2017-10-26/ChannelDefinition) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/transcribe-streaming-2017-10-26/ChannelDefinition) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/transcribe-streaming-2017-10-26/ChannelDefinition)