The FM-1
Turn your phone sideways for bigger controls.
Tab moves through the knobs, the buttons, the black keys and the white keys. Arrow keys turn a knob, Page Up and Page Down faster. Space or Enter holds a button or key down while you hold it; Shift and Enter keeps it down until you press it again (with a mouse: Shift-click or right-click).
Press Switch on, then PLAY/STOP. To hold a button or key down, right-click or Shift-click it, and click it again to let go. Then drag a dial, or use the scroll wheel on it. For the shuffle, hold SEL and turn SELECT.