有许多音调电子装置,如鸟鸣模拟器、电铃和音乐盒等,都可以按照预定的程序发出悦耳的音调。但是,由于它们每次发出的音调相同,随着时间的推移会逐渐令人讨厌。本文所介绍的音调自动装置,每次发出的音调是随机的,有变化的,也就是说它按照随机规律编程,这种音调的电路如图所示。其工作原理在于每次声音的音调由基准音调振荡器的整数倍分频 There are many tonal electronic devices, such as the bird simulator, bells and music boxes, etc., that emit sweet tunes in accordance with predetermined procedures. However, as they tone the same tone each time, they become increasingly objectionable over time. The tone automaton introduced in this paper, each tone is random, there is a change, which means that it is programmed according to random rules, the tone of the circuit shown in the figure. The working principle is that the pitch of each sound is divided by an integral multiple of the reference pitch oscillator