Google’s AI team has announced “Lyra” as a very low bit-rate codec for speech compression designed for use-cses like WebRTC and other video chats… With a bit rate so low that when combined with the likes of the AV1 video codec could potentially allow video chats over 56kbps Internet connections…

Source: Phoronix – Google’s New Lyra Voice Codec + AV1 Aim For Video Chats Over 56kbps Modems In 2021