Turn to right to make notes equal or longer than the specified length (the middle position disables the length variance). Turn the wheel to left to make the notes equal or shorter The Length control has no effect if the Piano roll SNAP Notes (disable the section if you don't want to add random notes). This section lets you set up the options used when generating the random The Length and Variation controls won't work if SNAP is set to '(none)'. Notes created by the randomizer have the length of the current snap.
Several options (such as Length, Variation, Stack, etc.) are available only for the Piano roll The notes can be based on a chord map and the tool allows pan, velocity and pitch randomization, etc. The Randomizer creates random notes in the Step Sequencer, or Piano roll (depending on the selected window).