could play in a wide range, from bass to treble range). The Taurus generated an analog synth bass tone for amplification by a bass amp. Other groups, such as Led Zeppelin and Van Der Graaf Generator used the bass pedals of the Hammond organ in place of a bass guitar for several of their recordings and for live performances. Other users included metal and hard rock bands such as Yngwie Malmsteen, Styx, and Francis Buchholz of the Scorpions, and Justin Harris of Menomena. Ex-Genesis guitarist Steve Hackett had a set mounted waist high, which his brother, John Hackett, played with his hands for the intro of Clocks – The Angel Of Mons from the album Spectral Mornings. Adam Jones of Tool uses the Moog Taurus along with an Access Virus B synth to trigger live effects. The keyboardist for the rock group Emerson, Lake & Palmer took this idea to its logical conclusion by performing all of the first movement, and part of the second of The Three Fates on the organ of Royal Festival Hall in London. As well, some pop groups (e.g., The Police, Muse, U2) and fusion bands have used bass pedalboards to produce sounds in the bass range. They are most commonly used by keyboard players as an adjunct to keyboards, but can be played in combination with other instruments (e.g., by the bass guitar or electric guitar player), or by themselves. Standalone pedalboards usually have a 13-note range and short pedals, which limits the types of basslines to fairly simple passages. A group's bass guitarist or electric guitarist playing the pedalboard from a standing position can only use one foot at a time, which further limits what they can play. The BASYN analog bass synthesizer is a two-VCO analog synthesizer with a 13-note "button board"—with momentary push-button switches in place of pedals. Another variant used in rock bands is a bass pedalboard laid out as a tabulature representation of part of the four strings of an electric bass guitar. MIDI and synthesizer pedalboards In the 1990s, standalone electronic MIDI controller pedalboards became widely available. Unlike the Moog Taurus pedalboards, MIDI pedalboards do not produce tones by themselves, but control a MIDI-compatible electronic keyboard or MIDI sequencer. In jazz organ trios, a keyboardist using this type of pedalboard usually connects it to a MIDI-compatible electronic Hammond organ-style keyboard. On modern electronic synthesizers such as the Yamaha