Purpose: As the famous linguist and anthropologist C. Hockett noted about 30 years ago, "What one sees of language, as of anything, depends on the angle of view, and different explorers approach from different directions. Unfortunately, sometimes they become so enamored of their particular approach that they incline to scoff at any other, so that instead of everybody being the richer for the variety, everybody loses... It is obviously impossible to see all of anything from a single vantage point. So it is never inappropriate to seek new perspectives" (Hockett, 1987, p. 1). This supplement takes such a broad perspective and contains a selection of peer-reviewed papers seeing speech production through the window of complex interactions between physical, linguistic, social, and communicative factors. Papers were presented at the 10th International Seminar on Speech Production in Cologne. We hope to encourage the reader to continue working in this exciting direction.