20th-century classical music is a diverse and innovative period that saw composers experimenting with new styles and techniques. This era introduced various movements, such as impressionism, led by composers like Claude Debussy, and expressionism, represented by figures like Arnold Schoenberg. These artists pushed the boundaries of traditional music, exploring dissonance and unconventional structures. Another significant aspect of 20th-century classical music is the rise of minimalism, with composers like Steve Reich and Philip Glass creating works that emphasize repetition and gradual change. This period also saw the incorporation of technology, as electronic music began to emerge, influencing how music was composed and experienced.