Processing : Event Operations : Grid Quantize : Quantize Grid

Quantize Grid
Quantize Grid Pop-Up Menu
Determines the beat boundaries to which MIDI notes, Elastic Audio events, and audio clip start points are aligned. Any size from whole notes (1/1) to sixty-fourth notes (1/64), including dotted and triplet values, can be selected for the Grid size.
Tuplet
Select the Tuplet option to quantize according to irregular note groupings, such as quintuplets (5 in the time of 4). The Quantize Grid for tuplets is calculated from the note size selection and the Tuplet value. For example, if an sixteenth note equals 240 ticks, quintuplet sixteenth notes with 5 in time of 4 would yield a Grid size of 192 ticks or (240 ticks/5)*4.
Offset Grid By
Offsets the Quantize Grid forward or back in time by a specified number of ticks. Use this option to achieve a pushed feel (by using positive values) or a laid back feel (by using negative values).
*
To Quantize just the backbeats, set the Quantize Grid to half-notes with an Offset of 960 ticks.
Randomize
When selected, MIDI notes, Elastic Audio events, and audio clips are moved randomly forward or back in time (after the Quantize occurs). For example, with the Quantize Grid set to eighth notes and Randomize set to 50%, notes and events are placed up to a 32nd note before or after the beat boundary. The Randomize setting also affects note durations (if Releases is selected).