web-audio-api

I'm trying to send audio, obtained by getUserMedia() and altered with the Web Audio API, over a PeerConnection from WebRTC. The Web Audio API and WebRTC seem to have the ability to do this but I'm having trouble understanding how this can be done. Within the Web Audio API, the AudioContext object contains a method createMediaStreamSource() , which provides a way to connect the MediaStream obtained by getUserMedia(). Also, there is a createMediaStreamDestination() method, which seems to return an object with a stream attribute. I'm getting both audio and video from the getUserMedia() method.

I have some audio buffer in usigned 8bit PCM format need to play via web audio which only accept signed 32bit PCM. And now I have ArrayBuffer for pieces of pcm_u8 data(come from Uint8array). How can I convert it to Float32Array? This function converts an ArrayBuffer to Float32Array var convertBlock(buffer) { // incoming data is an ArrayBuffer var incomingData = new Uint8Array(buffer); // create a uint8 view on the ArrayBuffer var i, l = incomingData.length; // length, we need this for the loop var outputData = new Float32Array(incomingData.length); // create the Float32Array for output for (i

Since you can call the the Soundcloud API via XHR (because of the CORS headers it sends http://backstage.soundcloud.com/2010/08/of-cors-we-do/ , right?) I was wondering if this was possible with the audio data itself, like a tracks' stream_url for example. When trying to open the stream_url with a XHR (from the Client Side) using the Web Audio API, i get a Origin is not allowed by Access-Control-Allow-Origin. error. Is there a way to load Audio resources via XHttpRequest from Client-Side-Javascript, or is it impossible ( https://stackoverflow.com/questions/10871882/audio-data-api-and-streaming

How can i create a pause function for my audio? I already have a play function in my script below. http://pastebin.com/uRUQsgbh function loadSound(url) { var request = new XMLHttpRequest(); request.open('GET', url, true); request.responseType = 'arraybuffer'; // When loaded decode the data request.onload = function() { // decode the data context.decodeAudioData(request.response, function(buffer) { // when the audio is decoded play the sound playSound(buffer); }, onError); } request.send(); } function playSound(buffer) { sourceNode.buffer = buffer; sourceNode.noteOn(0); } But how can i pause or

var context = new window.AudioContext() var request = cc.loader.getXMLHttpRequest(); request.open("GET", 'res/raw-assets/resources/audio/bgm.mp3', true); request.responseType = "arraybuffer"; request.onload = function () { context["decodeAudioData"](request.response, function(buffer){ //success cc.log('success') window.buffer = buffer playBgm() }, function(){ //error }); }; request.onerror = function(){ //error }; request.send(); function playBgm(){ var audio = context["createBufferSource"](); audio.buffer = buffer; var _volume = context['createGain'](); _volume['gain'].value = 1; _volume[

From what I've read I would expect the following JavaScript code to log "All is well", but instead it hits the error case: var audio = document.createElement('audio'); var ctx = new window.AudioContext(); var source = ctx.createMediaElementSource(audio); audio.src = 'http://www.mediacollege.com/audio/tone/files/440Hz_44100Hz_16bit_30sec.mp3'; // As @padenot mentioned, this is the number of channels in the source node, not the actual media file var chans = source.channelCount; if(chans == 1) { snippet.log("All is well"); } else { snippet.log("Expected to see 1 channel, instead saw: " + chans) }

I'm playing with the webkit Audio API and I'm trying to create an Echo effect, to accomplish that I've connected a DelayNode with a GainNode in a loop (The output of one is the input of the other, and viceversa). The effect works fine, but now I want to create an EchoNode Object that I can just plug-in and connect with the other AudioNode objects. Something like: myEchoNode = new EchoNode(); myConvolverNode = context.createConvolver(); myConvolverNode.connect(myEchoNode); I think that I should make my EchoNode inherit from AudioNode, so that the connect function of every other AudioNode would