An AS, or ambitonal sequence, is a kind of arithmetic and monotonic tuning.

An AS is a specific (rational) type of APS.

(n-)ASp: (n pitches of an) ambitonal sequence adding by p (equivalent to 1D 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.

example: AS5/4 = 1D JI lattice of 5/4 = 5/4 chain
quantity 1 2 3 4 5 6 7 8 9
frequency 1/1 5/4 25/16 125/64 625/256 3125/1024 15625/4096 78125/16384 390625/65536
pitch 0.00 0.32 0.64 0.97 1.29 1.61 1.93 2.25 2.58
length 1/1 4/5 16/25 64/125 256/625 1024/3125 4096/15625 16384/78125 65536/390625