![]() USB Type-C, offering a fast and simple level of connection for work or home. Immediately press and hold Option, Command, P and R keys for about 20 seconds and release them when you hear a startup sound. Realtek ALC1220 7.1 CH HD Audio Codec, ESS SABRE 9218 DAC, WIMA Audio. To do this, shut down your Mac and power it on again. This happens because the computer restores your hardware’s default settings, and sets the internal hard drive as the startup disk. Reset it to clear any glitches with any of these and other attributes. Your Mac laptop uses nonvolatile random-access memory to store different settings such as sound volume, time zone, display resolution and recent kernel panic information among others, and access them quickly. If you are having this issue on a Windows PC this guide may work for you. ![]() ![]() ![]() If you find audio not working on your Mac laptop, try updating your operating system to the latest version and see if it fixes the audio issue. That will get rid of the driver, and after that restart the computer and the USB Audio Codec should be back (rather than USB Audio Codec Demo) when you plugin in your USB device. Apple also improves and fixes audio latency, reliability of USB audio issues and other related user concerns. Each time a new macOS is released, it not only comes with improvements and new features, but also changes in audio drivers, kernel frameworks, Unix tools, new bugs and sometimes audio issues follow. ![]()
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