The Renaissance was a rebirth of humanism — the idea that human experience, not just divine worship, was worth expressing in art. Music followed. Composers began writing for secular courts as well as churches, and the printing press (invented c.1450) meant music could spread across Europe for the first time.
Polyphony reached extraordinary sophistication. The Franco-Flemish school (Dufay, Josquin) dominated early Renaissance music, developing complex interwoven vocal lines. By the late Renaissance, the English (Tallis, Byrd) and Italians (Palestrina, Gabrieli) had developed their own distinct voices.
The madrigal — a secular vocal piece for small ensemble — became the era's defining popular form. And at the very end of the Renaissance, a group of Florentine intellectuals invented opera, changing music forever.