Written by Luigi 卢梭洛 the leaflet 争论 that 传统 orchestras 限制 themselves to only four or five different 种类 of 声音

乐器 played with the bow
Plucked 乐器
Brass 乐器
Woodwinds and
打击乐

He demanded “We must break out of this 窄 circle of 纯 音乐 声音 and conquer the infinite variety of noise-sounds ”

“Let us [ ] invite young 音乐家 of genius and audacity to 聆听 attentively to all 噪音 so that they may 理解 the varied 节奏 [and tones] of which they are composed […] Then 对比 the varied 音色 of 噪音 with those of 音乐 音调 they will be convinced how much more [diverse and interesting are noise-sounds than 传统 管弦乐 sounds] ”