Why does music from the Baroque Era all sound the same?
You may have slightly misworded the topic. Each composer in the Baroque era had his own voice, (though Bach “borrowed” at times from others, such as Vivaldi), but they all composed in a style called contrapuntal, or polyphonic. The diatonic (which means major and minor scales are used) form of counterpoint emerged out of the earlier church mode counterpoint of Palestrina and Monteverdi (funny no one has used Monteverdi as a name for a car yet). Counterpoint is another name for polyphony, or “many sounds”, it can be understood as the art of using many voices at the same time. It can be contrasted with homophony, (which has nothing to do the LOGO network), which is a melody and chords. All good music has some degree of counterpoint, (“Hello, Goodbye” by the Beatles shows good counterpoint), but in the Baroque era it was the driving force behind the music, afterward, chord progression became the driving force. Also certain instruments were found in the Baroque, such as the Baroque trumpet