basistone
Basistone is a term sometimes used in music to refer to the fundamental or lowest-pitched note within a chord. In tonal music, the root of a chord is typically considered its basistone. For example, in a C major chord, which consists of the notes C, E, and G, the note C is the basistone. When a chord is played in its root position, the basistone is the lowest sounding note.
However, the concept of basistone can become more nuanced when considering inversions. In a first inversion