Nonstandard music notation is any system for notating music which augments or ignores the Western notation system. Systems like this have been around for the entire history of written music. Predating the Western system as we know it is the neumatic system, which uses neumes to indicate pitch and contour.
How do you notate rhythm?
Rhythm notation is created by altering the appearance of notes to indicate the relative duration that these notes occupy within a musical composition. Conversely, rests describe the relative length of silence.
What is standard notation in music?
Standard Music Notation (SMN) is a notation that primarily represents the evolution of pitch in time. In its present forms, pitches are repre- sented as locations on a five-line staff.