question

The streamId is supplied by AVS. You do not need to generate any special values for it. Each stream returned by audio player events contains a stream id (see: https://developer.amazon.com/public/solutions/alexa/alexa-voice-service/rest/audioplayer-events-response#stream-json-object). If you don't have an active stream, send an empty string. offsetInMilliseconds and playerActivity are values that you supply (see: https://developer.amazon.com/public/solutions/alexa/alexa-voice-service/rest/audioplayer-events-requests#playback-state-json-object). If you have not started playback of the stream, offsetInMilliseconds should be 0 and playerActivity should be IDLE. When you get a play directive, offsetInMilliseconds becomes how far into the stream you are, and playerActivity should be PLAYING. If you receive a stop directive, playerActivity should be PAUSED. The ... represent additional deviceContext objects. Currently, there is only playbackState, but the API can support others. Finally, the message header block should always be there. You'll never get a response without it.

i have followed your suggestion to fill in the params,this is my request body.(*********************** is outPutStream of PCM format audio file) i send this request with the same audio file many times ,but it only response 200code to me the first time, other time to response 204 code to me, --kevenACC111111 Content-Disposition: form-data; name="request" Content-Type: application/json; charset=UTF-8 { "messageHeader": { "deviceContext": [ { "name": "playbackState", "namespace": "AudioPlayer", "payload": { "streamId":"", "offsetInMilliseconds":0, "playerActivity":"IDLE" } } ] }, "messageBody": { "profile": "alexa-close-talk", "locale": "en-us", "format": "audio/L16; rate=16000; channels=1" } } --kevenACC111111 Content-Disposition: form-data; name="audio" Content-Type: audio/L16; rate=16000; channels=1 ************************************ --kevenACC111111--

Can you send me the request id? It should be returned as part of the 200/204 response.

this is return 200 code {'x-amzn-RequestId': '2e316286-dacc-11e5-8c75-cf3c39d0dba4', 'Content-Encoding': 'gzip', 'Transfer-Encoding': 'chunked', 'Vary': 'Accept-Encoding,User-Agent', 'Server': 'Server', 'Connection': 'keep-alive', 'Date': 'Wed, 24 Feb 2016 07:57:04 GMT', 'Content-Type': 'multipart/related; boundary=80deae74-ee58-4993-a5b6-96eddd99213c; start=metadata.1456300624138; type="application/json"'} this is return 204 code {'x-amzn-RequestId': '826ca2c2-dc2b-11e5-af36-7fd906fb3168', 'Content-Length': '0', 'Vary': 'Accept-Encoding,User-Agent', 'Server': 'Server', 'Connection': 'keep-alive', 'Date': 'Fri, 26 Feb 2016 01:51:53 GMT', 'Content-Type': 'application/json', 'x-amzn-ErrorType': 'NoContentException: https://developer.amazon.com/edw/home.html'} {'x-amzn-RequestId': '2147189d-dc2b-11e5-9329-aff0161a9d42', 'Content-Length': '0', 'Vary': 'Accept-Encoding,User-Agent', 'Server': 'Server', 'Connection': 'keep-alive', 'Date': 'Fri, 26 Feb 2016 01:49:11 GMT', 'Content-Type': 'application/json', 'x-amzn-ErrorType': 'NoContentException: https://developer.amazon.com/edw/home.html'}

A 204 response will occur when there is no recognizable speech to AVS, either because the audio is not formatted correctly or there or too much noise for the audio to be processed. Please ensure that the audio is recorded and sent as raw LPCM. Additionally you should ensure that you're recording follows the other specifications: 16khz, 16bit, 1 channel Also if you have verified that the audio is in the correct format it would also be helpful if you try playing the audio bytes before streaming them and listen to the output to ensure that your voice can be heard in the recording.