Providing a natural real-time audio communication experience at the scale of billions of users across WhatsApp, Instagram and Messenger is challenging, particularly given the diversity of devices and network conditions we encounter. Echo (hearing yourself back) and audio quality under low bandwidth network conditions, are two well known problems that can seriously disrupt the call experience. In this talk, we will discuss the results of our long-term investments and innovation in these two areas as well as recent launches that revamp the core of Meta’s audio processing stack powering calling across our Family of Apps.