About Antonio de Cabézon....
Antonio de Cabézon was a blind composer of the mid 1500s that was born around 1510 in Burgos, Spain. He spent most of his life traveling around in places like Italy, Germany, England and the Netherlands. Before that, he studied Organ in Palencia. His lifestyle was one of travel, which he did often with the royal chapel he was in service to. He did not lead a life of fame, for his works were not even published until 1578, two years after Antonio's death. Being a composer, he created music for the organ, harp, and vihuela. Some of his works are Llano, glosado en el tiple, glosado con contrabaro, and glosado con uozes de medio. His patrons were the royal line, Queen Elizabeth, Charles IV and Philip II. The isms most related to this composer and his pieces is naturalism and humanism. Antonio, in all his pieces, conveys emotion, making it naturalism. Emotion also puts it under humanism as well, for most of his pieces are not dark and gloomy, they were fairly optimistic, despite its composer being blind from birth.
This piece is Antonio's Diferencias sobre canto del callbero, and it was published around 1578 in the obras de musica para tecla, a four hundred page book filled with Antonio de Cabézon's work. That book is where his most famous works reside, and is where most of his compositions can be recreated and played into audio recordings and videos. The significance of this piece is that it demonstrates a form of composing called theme and variations, a form that Antonio was one of the first to use. This is basically when Antonio picked a basic harmony, or theme, and then varied how it was played, like at a slower or faster tempo, which was the variations piece of the form.
My Take on the Diferencias sobre del callbero.
Despite the cool variation and theme from Antonio used, I find this piece interesting because it was originally written to be played on the organ, or a keyboard instrument. The music for the piece could be translated into many different instruments as well as many different parts, and that is what I find interesting about the piece, that it was meant for one instrument and one part, but can make such complex piece using different instruments.
For the piece, I think that the Renaissance ism used is humanism. The piece itself does not sound gloomy or sad or mournful, but more motivational and optimistic. This piece is also expressing the composer, since it has nothing to do with religious hymns or any reference to anything religious in the entirety of the song.