Netflix has updated its Android app to make audio sound better thanks to its adoption of the xHE-AAC codec. The streaming giant says that the codec will âimprove intelligibility in noisy environments, adapt to variable cellular connections, and scale to studio-quality.â For context, xHE-AAC uses metadata to fix audio problems when streaming content on phones. Netflix notes that problems can arise due to background noise and tinny phone speakers that sound bad when you increase the volume. The streaming giant says that xHE-AAC offers enhanced dynamic range control that will reduce the difference between loud and quiet parts of a show or movie. This means that you wonât have to constantly turn the volume up or down.