IK Multimedia has announced iRig Keys ($100), a portable universal MIDI controller keyboard for iPhone, iPod touch, and iPad. Weighing slightly less than 1 1/2 pounds, and measuring roughly 20 inches long, the controller features 37 velocity-sensitive mini keys, plus five soft-touch buttons and one volume/data knob that can be customized for different purposes. It’s also both Core MIDI and USB compliant, arriving complete with a Dock Connector cable for iOS device attachment. iRig KEYS can be powered by Apple’s devices for brief periods of time, or longer via the USB port, and two free apps are included. It will be available this fall.