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.
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',
}),
}));