I believe @celine already posted this:
Parameters of the granular module
Sel: You can load any WAV sample using the select encoder and the Load button.
GrCo: grain frequency coarse (in hz) determines how fast the grains are triggered for playback.
GrFi: grain frequency fine (in hz) determines how fast the grains are triggered for playback.
Start: start of grain selection window. The start and length parameters lets you choose a window from which grains are randomly selected for playback at the grain frequency.
Lgth: length of grain selection window. The start and length parameters lets you choose a window from which grains are randomly selected for playback at the grain frequency.
GrDur: length of the grains (in ms). Using the grain duration parameter, it is possible to blend the grains together or isolate them more (this works together with the grain frequency).
Tune: tuning of the grains, in cents (-1200 … +1200). Using the Tune parameter, it is possible to tune the sound up or down +/- 1200 cents. This is useful when layering sounds which differ in pitch, so they can be made to be “in tune”.
Lvl: The level parameter is used to adjust the output level of the granular processor. Depending on the grain duration and frequency, when a lot of grains are mixed together, the output might clip, so this parameter can be used to adjust the output to avoid clipping the signal. You can keep an eye on the output scope when inside the granular processor screen to make sure it’s not clipping.
Encoder parameters on 2nd page. To switch between pages use the left and right buttons on the keypad.
NrGr: upper limit for number of grains that can be triggered. Using the number of grains parameter, it’s possible to limit the number of “grain voices” that are available. By setting this to a low value grains that are playing back will be interrupted by new grains which start playing. By setting the value high (e.g. 800) it’s possible to play a lot of grains together to create a dense texture. With the amount of grains active, the CPU usage goes up as well. Setting the parameter to a high value does not mean that the grains will be used, that depends on the grain frequency and duration. The number of grains parameter just sets an upper limit.
Crse: coarse frequency (pitch) of the sample.
Fine: fine frequency (pitch) of the sample.
Rand: randomization factor for grain start time and grain duration. Using the random setting, it’s possible to blend between randomization of grain start time (which is derived from the grain frequency) and randomization of grain duration.