Putting music into time sections does not mean that there were quick changes of type. Music changed slowly, and early Renaissance music was similar to Medieval music. Slowly music-writers started to try new ideas. A lot of medieval church music had become very hard with lots of rules about rhythms and clashes of notes to make dissonances. A lot of Renaissance composers wrote music which was smoother and more gentle. The music was still polyphonic with each voice having a share of melody. Music was starting to become less modal and more tonal. By the time the Baroque period started composers were using a system of major and minor keys like we do today.