Is it possible to play audio file or stream using actions-on-google-nodejs library?
Using SSML you can return an audio clip up to 120s.
<speak>
<audio src="https://actions.google.com/sounds/v1/animals/cat_purr_close.ogg">
<desc>a cat purring</desc>
PURR (sound didn't load)
</audio>
</speak>
Edit
If you want to play audio the mp3 file (over 120s), you need to use Media Responses
if (!conv.surface.capabilities.has('actions.capability.MEDIA_RESPONSE_AUDIO')) {
conv.ask('Sorry, this device does not support audio playback.');
return;
}
conv.ask(new MediaObject({
name: 'Jazz in Paris',
url: 'https://storage.googleapis.com/automotive-media/Jazz_In_Paris.mp3',
description: 'A funky Jazz tune',
icon: new Image({
url: 'https://storage.googleapis.com/automotive-media/album_art.jpg',
alt: 'Ocean view',
}),
}));