Acer often updates drivers less frequently than Realtek. If the latest Acer driver is over 2 years old, consider an official Realtek generic driver (see below).
The Essential Role of Acer Sound Drivers in Computing In modern computing, the bridge between complex hardware components and the user’s sensory experience is often built by a small but critical piece of software: the driver. For users of Acer laptops and desktops, sound drivers—typically provided by manufacturers like Realtek—act as the vital translator that converts digital data into audible sound. While these drivers often work silently in the background, their absence or failure quickly highlights their importance, transforming a high-end multimedia machine into a silent tool. The Bridge Between Hardware and Software acer sound drivers
Before you panic, try these solutions in order. Acer often updates drivers less frequently than Realtek