title: record audio from browser and visualize in real time
body: <p>I am looking for a package which will take input of audio from browser through microphone then visualize it in the real time.Any javascript package available to implement.I check most of the audio visualizer but they need audio file .I want  the package should directly get it from microphone in browser and then show visualization.I am implementing it in the nodejs so need something in java script</p>