A musical parameter is a measurement tool that allows us to evaluate the various components of music. ... the three most common musical parameters used are the rhythm, the Tempo, and the key signature of the music.
Three categories are rhythm, the Tempo, and the key signature of the music.
Before photography, visual arts was one of the only way to capture the world. Famous artists painted portraits of significant people and beautiful landscapes which are very time consuming. I would say photography in its early days is simply a realistic window to see the world and the people in it. The inventors of photography believed that photos are no longer drawn by hand, but "written by light". An article on petapixel says: The use of cameras has allowed us to capture historical moments and reshape the way we see ourselves and the world around us.
