let player = videojs('myAudio', {
    controls: true,
    width: 600,
    height: 300,
    plugins: {
        wavesurfer: {
            debug: true,
            backend: 'WebAudio',
            waveColor: 'black',
            cursorWidth: 0,
            interact: false,
            hideScrollbar: true,
            plugins: [
                // enable microphone plugin
                WaveSurfer.microphone.create({
                    bufferSize: 4096,
                    numberOfInputChannels: 1,
                    numberOfOutputChannels: 1
                })
            ]
        },
        record: {
            audio: true,
            video: false,
            maxLength: 20,
            debug: true
        }
    }
});