The first computer to feature a digital sound processor was the Commodore Amiga released in 1985.

It has two parts: an external sound processor worn over the ear, and an implant inserted during a surgical procedure.

The THX crossover is a proprietary sound processor that separates the low and high frequencies to provide cleaner sound over the theater's sound system.

This device uses one microphone for the input, but has two separate digital sound processors for differentiated processing.

The system is capable of providing hearing via the TIKI device in stand-alone mode (invisible hearing) or via an external sound processor.

After 1-4 weeks of healing (the wait is usually longer for children than adults), the implant is "activated" by connecting an external sound processor to the internal device via a magnet.

Also including a 24-bit 64-voice sound processor with supports up to 32 MB of external memory, 10-megapixel camera support, and 3D graphics engine version 2.

Both Cochlear and Oticon Medical's Baha bone conduction hearing solutions utilize a bone-anchored sound processor that convert incoming sound into vibrations.

In 1993, the list also includes "digital sound processor."

A phaser is an electronic sound processor used to filter a signal by creating a series of peaks and troughs in the frequency spectrum.