Behold, like a magic trick, what happens when we remove the simple tonal contrast!
看好了，现在我们把色差对比去除，看看它变成什么样子！是不是和变戏法一般不可思议？
Using the recently released sndpeek program to do the sophisticated processing, we will run a simple Perl program to allow for the easy generation of tonal codes.
最近发布的sndpeek程序可用来进行复杂的处理，借助它，我们只需运行一个简单的Perl程序来生成音调代码。
Your first tonal sequence should be simple: two low tones with 0.5 seconds between them for a "beep beep."
第一个音调序列应当很简单：两声低音哔哔，间隔为0.5秒。
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