Guidonian hand
In Medieval music, the Guidonian hand was a mnemonic device used to assist singers in learning to sight-sing. Some form of the device may have been used by Guido of Arezzo, a medieval music theorist who wrote a number of treatises, including one instructing singers in sightreading. The hand occurs in some manuscripts before Guido's time as a tool to find the semitone; it does not have the depicted form until the 12th century. Sigebertus Gemblacensis in 1105–10 did describe Guido using the joints of the hand to aid in teaching his hexachord. The Guidonian hand is closely linked with Guido's new ideas about how to learn music, including the use of hexachords, and the first known Western use of solfege.
Mose Giganticus
Garfield, drummer in several Philadelphia-area hardcore punk rock bands, began Mose Giganticus as a solo electronic home-recording project in 1999, playing few occasional live performances. His focus on the band intensified years later, in 2005, with a significantly revamped sound rooted in hardcore punk, while still maintaining prominent elements of electronic music. This effort culminated in the 2006 debut full-length album, "The Invisible Hand", a concept record based around humanity's relationship with technology. Initially released on Richmond, Virginia-based Valiant Death Records, the record was followed by several US tours in 2007 with fellow electronic bands Abiku and The Emotron. During these early tours, Garfield performed solo, layering live vocals and keyboards over pre-recorded backing tracks. A compilation featuring remixes from 23 artists of the track "My Machine" from "The Invisible Hand", tentatively titled "Our Machine: Remix Collection", was later completed and scheduled to be released on Valiant Death Records in early 2008, but failed to materialize when the label folded unexpectedly due to financial troubles.