Technical Specification: Context-based Audio Enhancement (MPAI-CAE) V2.1 specifies technologies that improve the user experience for audio-related applications including entertainment, communication, teleconferencing, gaming, post-production, restoration etc. in a variety of contexts such as in the home, in the car, on-the-go, in the studio etc. using context information to act on the input audio content, and potentially deliver the processed output via an appropriate protocol. MPAI-CAE specifies four Use Cases and one Composite AIM. The Use Cases are: Emotion Enhanced Speech (EES), Audio Recording Preservation (ARP), Speech Restoration System (SSR), and Enhanced Audioconference Experience (EAE); the Composite AIM is Audio Scene Description (ASD).