2 Introduction

The automotive industry is experiencing a major transformation focused on comfortable driving experience without compromising fuel-efficiency and manufacturing cost. Car OEMs are constantly refreshing their audio system architecture to accommodate user-rich experience and better safety by incorporating several new audio technologies. These audio technologies such as active noise cancellation (ANC), in-cabin communication (ICC), and hands-free voice beam-forming use several microphones, amplifiers, and loudspeakers along with advanced digital signal processing techniques to enable background noise reduction, clear voice communication between passengers and hands-free calling. ANC is often incorporated in multiple end-equipments such as head-unit (or digital cockpit processing unit) or external amplifiers or can have it's own standalone module. To make the system implementation simple and cost-effective, the audio inputs from ANC microphones can be combined with hands-free microphones or other auxiliary line inputs. This paper highlights the several use-case of PCM6xx0-Q1 for microphone and line input applications.