title: Echo and noise in sound webRTC android
body: <p>I am working on webRTC i am doing live stream between two android devices on local network it is working pretty fine for me except the sound quality issue there is noise and echo in sound. If i use hands-free on one end it gets better but i don't want to use hands-free.</p>
  
  <p>So how can i improve the sound quality, what techniques are there to improve the sound quality. It also said the webRTC has echo cancellation functionality built in if it's than why echo is still there. </p>