Agora has released v2.1.1 of its Client SDKs with new features and improvements. The updated SDK allows users to enhance audio effects from built-in microphones, supports custom video sources and sinks, introduces a new gaming and entertainment audio profile, and replaces channel/permission keys with tokens for easier use. Other improvements include support for up to 17 participants in a call, enhanced screen sharing, better camera control, hardware encoder support on various SoCs, continuous improvements in video quality, and bug fixes from version 2.1.