The Present, Past, and Future of Timbre Research / Kai Siedenburg, Charalampos Saitis, Stephen McAdams -- Part I. Principal Perceptual Processes. The Perceptual Representation of Timbre / Stephen McAdams -- Timbre Recognition and Sound Source Identification / Trevor R. Agus, Clara Suied, Daniel Pressnitzer -- Memory for Timbre / Kai Siedenburg, Daniel Müllensiefen -- The Semantics of Timbre / Charalampos Saitis, Stefan Weinzierl -- Neural Correlates of Timbre Processing / Vinoo Alluri, Sudarsana Reddy Kadiri -- Part II. Specific Scenarios. Voice Processing and Voice-Identity Recognition / Samuel Robert Mathias, Katharina von Kriegstein -- Timbre as a Structuring Force in Music / Stephen McAdams -- Timbre, Sound Quality, and Sound Design / Guillaume Lemaitre, Patrick Susini -- Timbre Perception with Cochlear Implants / Jeremy Marozeau, Wiebke Lamping -- Part III. Acoustical Modeling. Audio Content Descriptors of Timbre / Marcelo Caetano, Charalampos Saitis, Kai Siedenburg -- Modulation Representations for Speech and Music / Mounya Elhilali -- Timbre from Sound Synthesis and High-Level Control Perspectives / Sølvi Ystad, Mitsuko Aramaki, Richard Kronland-Martinet