Playing sound clip in Python

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alexasboy asked Jan 15, '16

Playing sound clip in Python

HELP! How do I play sound clips when using Python rather then Java??? Appreciate the assistance!

alexa skills kit

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Answer 1 · 2016-01-15T18:12:00Z

Galactoise answered Jan 15, '16

It shouldn't matter what language you are using, you just have to make sure that your response speech is ssml and contains an audio tag pointing to your clip. That said, there are a ton of requirements about the manner in which the audio is encoded, so I'd recommend starting with a known-good audio sample for your testing.

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Answer 2 · 2016-01-15T19:16:29Z

jjaquinta answered Jan 15, '16

To Galactoise's end, TsaTsaTzu has uploaded a bunch of sound clips in the correct format for public use here: https://s3.amazonaws.com/tsatsatzu-alexa/index.htm

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Answer 3 · 2016-01-15T19:40:30Z

alexasboy answered Jan 15, '16

I really appreciate the quick feedback. As a somewhat new developer, I am a little confused as to how to format the response. I have included this piece of code: "outputSpeech": { "type": "SSML", "ssml": " This output speech uses SSML. " } What I do not understand is how to format the audio tag portion. The sample I see is below but I am not sure how to use that piece of code without getting syntax errors. Welcome to Car-Fu. You can order a ride, or request a fare estimate. Which will it be? Apologies if this is a silly 101 question!

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Answer 4 · 2016-01-15T20:36:40Z

alexasboy answered Jan 15, '16

I figured it out. Thanks again for your assistance!

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Answer 5 · 2016-01-17T21:24:35Z

Paul Reiche III answered Jan 17, '16

Would you mind including the final formatted statement?

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Answer 6 · 2016-01-20T00:48:12Z

alexasboy answered Jan 20, '16

def build_speechlet_response(title, output, reprompt_text, should_end_session): return { 'outputSpeech': { "type": 'SSML', "ssml": ' here goes the clip ' }, 'card': { 'type': 'Simple', 'title': 'SessionSpeechlet - ' + title, 'content': 'SessionSpeechlet - ' + output }, 'reprompt': { 'outputSpeech': { 'type': 'PlainText', 'text': reprompt_text } }, 'shouldEndSession': should_end_session }

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Answer 7 · 2016-03-27T16:46:13Z

Kwan answered Mar 27, '16

Hi jjaquinta, if you are using ffmpeg to do the encoding, would you tell me the command line parameters that you used? I am a bit surprised the effort I had to go and still not able to get the SSML required format done correctly. I have tried many different mp3 codecs (including ffmpeg) coding the audio files at 48kbps, but none worked with Alexa -- except your TzaTzaTzu files! If you are using another MP3 encoder, would you also share that information with me. Thanks for your help.

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Answer 8 · 2016-03-27T19:23:40Z

jjaquinta answered Mar 27, '16

I'm not at my computer right now. But, yes, I did use ffmpeg. Do a Google search for something like Amazon Alexa ssml ffmpeg. There is a page in the Amazon docs with the settings to use. Also in this forum. They have worked for me. If you don't find it by tonight I'll look up the exact settings I use and post them.

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Answer 9 · 2016-03-28T00:10:01Z

Kwan answered Mar 28, '16

Yes, I did find something from stackoverflow: http://stackoverflow.com/questions/34583224/what-is-the-right-command-to-convert-an-mp3-file-to-the-required-codec-version. This is the command I used where, for me, input.wav was a 48Khz PCM wave file. ffmpeg -i input.wav -b:a 48k -ar 16000 output.mp3

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Answer 10 · 2016-03-28T01:26:22Z

jjaquinta answered Mar 28, '16

I think this is the canonical command line: [code]ffmpeg -i -ac 2 -codec:a libmp3lame -b:a 48k -ar 16000 [/code] At least that is what I have in my code. I had to 1000+ sound files for Acoustic Chord, which just got submitted. Each one started as six files, one for each string on a guitar. Each had to be pitch adjusted depending on which fret the figure was on in the tabulature, then timed, blended, and mixed together to get the sound of the chord being plucked and then strummed. All told, rather a lot of ffmpeg manipulation. :-) But the final pass of processing was using a command, like the above, to convert the final mix to an Alexa compliant mp3 file. Hopefully you can heard the final result in a few days if it passes certification. This was on Windows, but I think it will be the same on all platforms. You do need to install the LAME MP3 support, and how you do that differs on each platform.

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