tonegerator是运行在iOS上的音调信号发生器demo code ，帮助学习如何在iOS 上使用音频口发出定制信号。-tonegerator is running on iOS tone signal generator demo code, to help learn how to use custom audio ports emit signals on iOS.

iOS频率生成器，根据给点频率生成对应的声音片段。(IOS frequency generator, according to the given point frequency to generate the corresponding sound clip.)