The rapid adoption of Dolby Atmos in automotive audio systems marks a fundamental shift from traditional channel-based reproduction toward object-based, content-driven spatial audio. Unlike legacy surround upmixers, which algorithmically derive envelopment from stereo or limited multichannel sources, Dolby Atmos enables playback of artist-authored spatial intent through dynamic rendering tailored to the vehicle’s speaker layout. This transition introduces both new opportunities and significant engineering challenges for OEMs and suppliers. This workshop explores the evolving role of immersive audio in the automotive environment, comparing the perceptual, technical, and implementation differences between Atmos rendering and advanced upmixing approaches. Key topics include system architecture implications such as height channel integration, the continued necessity of upmixers for non-Atmos content, and the balance between spatial accuracy and brand-specific sound tuning. Emphasis is placed on real-world constraints unique to vehicles, including asymmetric cabin geometries, seat-to-seat variability, limited speaker placement options, and the impact of reflective surfaces on spatial perception. The discussion will also address computational and cost considerations, content variability, and the challenges of validating spatial audio performance using both objective and subjective methods. Through a combination of technical insights and practical examples, this workshop aims to provide a comprehensive understanding of how immersive audio technologies are reshaping automotive sound system design. Attendees will gain perspective on best practices, current limitations, and future directions for delivering compelling spatial audio experiences in production vehicles. As automotive audio systems evolve into high-channel-count, software-defined platforms, OEM decision-makers face a critical question: how to deliver compelling spatial audio experiences from a content ecosystem still dominated by stereo. This workshop examines the role of sound quality evaluation in guiding that transition, tracing the evolution of upmixing technologies from early matrix decoding to modern content-adaptive and object-inspired approaches. While upmixers remain essential for scalability across legacy content, they introduce inherent limitations—including spatial ambiguity, tonal artifacts, and content-dependent performance—that directly impact perceived quality and brand differentiation. In contrast, discrete multichannel and object-based formats such as Dolby Atmos offer improved localization, stability, and creative intent preservation, but introduce challenges in content availability, system cost, and integration complexity. Through a combination of technical insights, perceptual evaluation frameworks, and real-world automotive case studies, this workshop will explore how these trade-offs manifest in production vehicles. Special emphasis will be placed on how sound quality metrics—both objective and listener-based—can inform system tuning strategies, feature prioritization, and platform decisions.
