“…These authors further go on to describe a "neutral" or "blue note" third as a blending between the two. It has long been observed that the blues artist frequently slurs between major and minor thirds (Jones, 1951;Kubik, 1999Kubik, , 2005Kubik, , 2008Niles, 1972;Stoia, 2010;von Hornbostel (as cited in Kubik, 2008, p. 16); Weisethaunet, 2001). Temperley et al (2017) postulate that the distributions of two distinct auditory targets (like Figure 3) separated by a half step should have an additive overlap between tones, but the resultant curve should present as two peaks with a definite "valley" between them, if the two notes were sung as independent vocal projections.…”