Fig. 1
From: Music is scaled, while speech is not: A cross-cultural analysis
The scaledness continuum from speech to sung speech to instrumental music. Speech and music can be either separate from one another or they can be combined to create composite forms of sung speech. Speech itself can be produced in either the standard manner of adult conversation or in a more prosodic manner, such as the style of a stage actor. Sung speech can be produced in either a chanted manner than is relatively speech-like or in a more musical manner that is sung with high pitch-precision. The arrow along the bottom depicts a presumed continuum of scaledness from pure speech to sung speech to pure music. Along the top of the figure are depicted Spencer’s (1857) “speech theory” of the origins of song/music and Sachs’ (1943) dual-origins model of the origins of song. Note that the spacing between forms is only approximate and that the figure is not meant to make quantitative predictions.
