AudioInputEvent - Amazon Lex


Represents a chunk of audio sent from the client application to Amazon Lex V2. The audio is all or part of an utterance from the user.

Amazon Lex V2 accumulates audio chunks until it recognizes a natural pause in speech before processing the input.



An encoded stream of audio.

Type: Base64-encoded binary data object

Required: No


A timestamp set by the client of the date and time that the event was sent to Amazon Lex V2.

Type: Long

Required: No


The encoding used for the audio chunk. You must use 8 KHz PCM 16-bit mono-channel little-endian format. The value of the field should be:

audio/lpcm; sample-rate=8000; sample-size-bits=16; channel-count=1; is-big-endian=false

Type: String

Length Constraints: Minimum length of 1.

Required: Yes


A unique identifier that your application assigns to the event. You can use this to identify events in logs.

Type: String

Length Constraints: Minimum length of 2. Maximum length of 100.

Pattern: [0-9a-zA-Z._:-]+

Required: No

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: