Guido of Arezzo
In the 12th century, a development in teaching and learning music in a more efficient manner had arisen. Guido of Arezzo's alleged development of the Guidonian hand, more than a hundred years after his death, allowed for musicians to label a specific joint or fingertip with the gamut (also referred to as the hexachord in the modern era). Using specific joints of the hand and fingertips transformed the way one would learn and memorize solmization syllables. Not only did the Guidonian hand become a standard use in preparing music in the 12th century, its popularity grew more widespread well into the 17th and 18th century. The knowledge and use of the Guidonian hand would allow a musician to simply transpose, identify intervals, and aid in use of notation and the creation of new music. Musicians were able to sing and memorize longer sections of music and counterpoint during performances and the amount of time spent diminished dramatically.
Guido Pisano
Either on 20 April (Easter), at Bamberg, or else on 23 April, at an imperial diet held in Nuremberg, he had a personal audience with Conrad. At the end of the month he met Wibald, a friend with whom he had corresponded by letters for over twenty years, in Würzburg. Guido joined Pope Eugene when the latter took ship from Pisa to France in 1147, there to hold several reforming councils and encourage the Second Crusade. Guido was with the Papal entourage when it entered Trier on 30 November. They returned to Rome in April 1148.