AudioContext.createMediaStreamSource alternative for iOS?

Question

I've developed an app using Cordova and the Web Audio API, that allows the user to plug in headphones, press the phone against their heart, and hear their own heartbeat.

It does this by using audio filter nodes.

 //Setup userMedia
context = new (window.AudioContext||window.webkitAudioContext);
navigator.getUserMedia = (navigator.getUserMedia ||
                          navigator.webkitGetUserMedia ||
                          navigator.mozGetUserMedia ||
                          navigator.msGetUserMedia);
navigator.getUserMedia(
                        {audio:true},
                        userMediaSuccess,
                        function(e) {
                            alert("error2 " + e.message);
                        });

function userMediaSuccess(stream)
{   
    //set microphone as input
    input = context.createMediaStreamSource(stream);

    //amplify the incoming sounds
    volume = context.createGain();      
    volume.gain.value = 10;

    //filter out sounds below 25Hz
    lowPass = context.createBiquadFilter(); 
    lowPass.type = 'lowpass';
    lowPass.frequency.value = 25;

    //filter out sounds above 425Hz
    highPass = context.createBiquadFilter(); 
    highPass.type = 'highpass';
    highPass.frequency.value = 425;

    //apply the filters and amplification to microphone input
    input.connect(lowPass);
    input.connect(highPass);
    input.connect(volume);

    //send the result of these filters to the phones speakers
    highPass.connect(context.destination);
    lowPass.connect(context.destination);       
    volume.connect(context.destination);


}

It runs fine when I deploy to Android, but it seems most of these features aren't available on iOS mobile browsers.

I managed to make getUserMedia function using the iosRTC plugin, but createMediaStreamSource is still "not a function."

So, I'm looking for an alternative to the Web Audio API that can filter out frequencies, or if there are any plugins I could use, that would be perfect.

Answer 1

There's no way to do this on ios web. You'd need a native app, since Apple doesn't support audio input in safari.