What are the available Tracker controls, can I control it with computer keyboard?

No, you can't connect a computer keyboard to the PT :) But there's no need to. It's equipped with dedicated controls for fast action programming. Polyend Tracker’s user interface offers different types of controls that can all be used alternatively to navigate and operate the instrument. Most of the values/data input in the Tracker is done by using the silicone grid pads, aluminium jog-wheel, the dedicated mechanical function keys and the display corresponding screen keys. In most scenarios, these controllers can be used interchangeably – e.g. volume Fx1 value can be precisely entered using the jog-wheel scrolling for the desired value but also entered with a single press of the pad with the exact value.