In After Effects, many properties and methods take or return vectors. After Effects refers to an Array as a vector if it represents either a point or direction in space. For example, After Effects describes position as returning a vector.

However, though a function like audioLevels does return a two-dimensional value (the left and right channel levels), it is not called a vector because it does not represent a point or direction. Some functions in After Effects accept vector arguments, but they are generally only useful when the values passed represent a direction. For example, cross(vec1, vec2) computes a third vector that is at right angles to the input vectors. This is useful when vec1 and vec2 are two vectors representing directions in space, but not if they just represent two arbitrary collections of numbers.