“Hard” or “Soft”

Recent research has shown that the shape, timbre, and intensity of a sound influence the perception of its timing at the micro level of rhythm. In this case study of contemporary Norwegian jazz, we investigate to what extent jazz musicians intentionally use sonic features to shape the micro level of rhythm in their performances. First, we provide an overview of existing research into microrhythm in jazz and auditory perception studies. Then we present results from interviews with five expert jazz musicians about how playing techniques and sound qualities of specific instruments are utilized to influence the perception of timing. We also analyze two selected performances by the musicians to explore the effects of interaction between sonic features and timing in a musical context. The article concludes by discussing the results in the context of findings from empirical research into microlevel auditory perception regarding the perceptual center of sounds (P-center) and auditory stream segregation. The study demonstrates the need to move related research beyond the temporal domain, and to cultivate a more holistic approach to what constitutes groove in jazz and related genres.