英语翻译One can trace jazz arrangements back to the 1920s,not by

英语翻译
One can trace jazz arrangements back to the 1920s,not by chance coinciding with the so-called birth of jazz in the United States.The earliest arrangements varied in the size of group and often were less formal than current versions.The "swing" era of the 1930s and 1940s ushered in a new and popular style of American music that relied on big bands.Though the "big band" or swing era provided an opportunity for arrangers to showcase their works in front of mass audiences on a regular basis,it had musical drawbacks as well.The big band era's eventual demise led to the birth of a more open-ended and artistically-driven environment in which jazz arrangers write more according to their creative instincts than a set formula.