However , these became common for early 20th - century composers like Claude Debussy and Igor Stravinsky , who were searching for a new musical language .
Whole - tone scales and polytonality are foreign to music of the Classical era .
These became common for early 20th - century composers like Claude Debussy and Igor Stravinsky , who were searching for a new musical language .
Whole - tone scales and polytonality are foreign to music of the Classical era .