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.
Lodovico Grossi da Viadana
Viadana is important in the development of the early Baroque technique of basso continuo, and its notational method, known as figured bass. While he did not invent the method—figured basses occur in published sources from at least as early as 1597 —he was the first to use it in a widely distributed collection of sacred music ("Cento concerti con il basso continuo"), which he published in Venice in 1602. Agostino Agazzari in 1607 published a treatise describing how to interpret the new figured bass, though it is clear that many performers had by this time already learned the new method, at least in the most progressive musical centers in Italy.