Drum kits are "sets" of different instruments (sounds) that have been assigned to each of the pads. There are 15 factory Drum Kits to choose from in the TD-1K module.
Here's how to select the kits:
1. With the power turned on, press the SELECT button repeatedly until the red DRUMS indicator is lit.
2. Press the (+) or ( - ) buttons to choose a kit (1-15).