Represents the query input. It can contain either:
- An audio config which instructs the speech recognizer how to process the speech audio. 
- A conversational query in the form of text. 
- An event that specifies which intent to trigger. 
| JSON representation | 
|---|
| { // Union field | 
| Fields | |
|---|---|
| Union field input. Required. The input specification.inputcan be only one of the following: | |
| audioConfig | 
 Instructs the speech recognizer how to process the speech audio. | 
| text | 
 The natural language text to be processed. Text length must not exceed 256 character for virtual agent interactions. | 
| event | 
 The event to be processed. |