ios 官方 sdk的例子 下载下来 便于学习，有需要的朋友可以先看看，看压缩包名称 就知道是什么控件了。-examples of the ios official sdk download easy to learn, a friend in need can take a look to see compressed package name to know is what controls.

iPhone sound Oscilloscope demo source. Contains xCode project file )-iPhone sound Oscilloscope demo source. Contains xCode project file )

iPhone Audio Unit Sample Code