We live in a golden age for MIDI controllers. [rheslip]’s contribution to the milieu is a twisty take on the format, in that it’s covered in an array of knobs. Thus the name—Twisty 2.

First, it's important to know that some USB ports are designed for charging while others may only support data transfer. Most will provide a measly output of 0.5 to 1 amp -- barely enough to ...