Analog robot
An analog robot is a type of robot which uses analog circuitry to go toward a simple goal such as finding more light or responding to sound. The first real analog robot was invented in the 1940s by William Grey Walter. The name of these robots were ELSIE and ELMER (Electro Mechanical Robot). The original circuitry was developed using two vacuum tubes and a photocell to search and follow a light. Recently a kind of analog robots was developed by Mark Tilden.
Haile (robot)
Haile (pronounced Hi-lee) is a robot percussionist developed by the Georgia Institute of Technology that listens to music in real time and creates an accompanying beat. The robot was designed in 2006 by Georgia Tech's professor of musical technology, Gil Weinberg. He and one of his graduate students, Scott Driscoll, created the robot to be able to "listen like a human, [and] improvise like a robot" (Weinberg). Haile "listens" through a microphone mounted on the drum and analyzes the sound, separating it into beats, rhythms, pitches and several other qualities. Detecting changes in these qualities helps Haile to assume either a leading or following style of play, roles that define the robot's collaborative abilities. Haile was also the first robot to create an acoustic percussion experience rather than play music through speakers. Its anthropomorphic design, which gives it movable arms that can move in any direction, allow it to create this acoustic music.