Its full specification is (n-)ASp: (n pitches of an) ambitonal sequence adding by rational interval p. The n is optional. If not provided, the sequence is open-ended.
Relationship to other tunings
vs. 1D JI Lattice & equal multiplications
It is equivalent to a 1-dimensional JI lattice of p. These are sequences which are rational but ambiguous between otonality and utonality, such as a chain of the same JI pitch. It is also equivalent to an equal multiplication of a rational interval p.
The only difference between an (n-)ASp and an (n-)APSp (arithmetic pitch sequence) is that the p for an APS is irrational.