sebpiq/node-web-audio-api

Node.js implementation of Web audio API

Samuel Goldszmidt

@ouhouhsami

so, good luck with all that stuff ;)

Hugh Rawlinson

@hughrawlinson

Thanks! :)

Samuel Goldszmidt

@ouhouhsami

cheers

Jefferson de Andrade Santos

@jersobh

Hi folks

I'm trying to create a simple code to play a mp3 file

const AudioContext = require('web-audio-api').AudioContext
  , audioCtx = new AudioContext
  , Speaker = require('speaker')

  var constraints = {
    audio: {
      echoCancellation: true
    }
  };

  var player = new Audio();
  player.src= "samba.mp3"
  audioSource = this.audioCtx.createMediaElementSource(player);
  audioSource.connect(this.music_node);
  this.music_node.connect(this.outputNode);

  this.outputNode = this.audioCtx.createGain();
  this.voice_node = this.audioCtx.createGain();
  this.music_node = this.audioCtx.createGain();
  this.voice_volume = 50
  this.music_volume = 50
  this.output = 100

var channels = 2;

audioCtx.outStream = new Speaker({
  channels: channels,
  bitDepth: 128,
  sampleRate: 44100
})

but I can't create the "new Audio()"

ReferenceError: Audio is not defined

Would that be the audioParam?

Jefferson de Andrade Santos

@jersobh

I also have the option to get a stream data if this one is not possible.. but it would be great

Jefferson de Andrade Santos

@jersobh

Please folks, I just need to create this API; just a simple mp3 player with web audio api

Just to sync the node webaudio api data with my frontend data via websockets.

Chinmay Pendharkar

@notthetup

@jersobh AFAIK this project is in a little bit of flux right now. You might have noticed the change in the repo ownership. So updates might take some time.

Jefferson de Andrade Santos

@jersobh

But do you know how can I archieve this w/o web audio API?

Chinmay Pendharkar

@notthetup

@jersobh If you just want to play an mp3 file, could you not just use something like https://www.npmjs.com/package/lame?

and pipe that into speaker

Jefferson de Andrade Santos

@jersobh

I'll take a look.. In fact i'm using liquidsoap, and I only know how to plug it in web audio API

But i'll take a look, thanks

Chinmay Pendharkar

@notthetup

so Webaudio API is a browser API

it's pretty complex and lots of nuances involved in it

it's not an easy task to implement that in node, hence this project is taking time

Jefferson de Andrade Santos

@jersobh

I ser

See*

Chinmay Pendharkar

@notthetup

I'm still not sure what you're trying to achieve, so can't really help that much

Jefferson de Andrade Santos

@jersobh

I'm thinking about using node-fluent-ffmpeg... But I couldn't figure out how to create the stream for broadcasting

It's a radio platform

Using liquidsoap/icecast

I have the frontend up and running, but it only works if the browser is open

I want to put it on a service running on a server

To create that stream on server si de

Chinmay Pendharkar

@notthetup

yea.. the frontend will only work if the browser is open..

that's how browsers work

so you wanted to have a mock server to test the streaming server?

Jefferson de Andrade Santos

@jersobh

I was trying to say that the music can only be played while the browser is open

so I need to create the streaming service

I've already sync. the playlist with socket.io

so when I open the frontend, it loads all the configs for the streaming, as the playlist

but I need to play it on node's side, so when the browser is closed, it still plays

Jefferson de Andrade Santos

@jersobh

this is how I connect it

var webcast = this.audioCtx.createWebcastSource(4096, 2);

this.outputNode.connect(webcast);

webcast.connect(this.audioCtx.destination);

webcast.connectSocket(encoder, this.url);

I need to do this but from node, and the encoder param is the encoded audio

Chinmay Pendharkar

@notthetup

sorry still confused :(

createWebcastSource is from https://webcast.github.io/ right? So you're trying to stream FROM the browser TO some server?

let's start from the beginning (for my sake) :)

You have a audio streaming server that uses liquidsoap/icecast to stream out the audio

are you trying to build a client that will receive that audio from the icecast server? or?

Jefferson de Andrade Santos

@jersobh

That's what I'm already doing

Streaming from the browser to a server

Chinmay Pendharkar

@notthetup

oh! streaming from the browser to the server

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