Basic tastes – A philosophical consideration

Are there ‘basic’ tastes and, if so, how many are there? While, to date, this question has mostly been addressed by sensory scientists, it would seem ripe for contemporary philosophical consideration (i.e., after Plato and Aristotle’s early discussion of the matter). Consider only the fact that the majority of those scientists who have written on the subject appear unable to make up their minds as to whether or not umami should be classed as a basic taste, alongside sweet, bitter, sour, and salt