sine-generator, the paper wrote directly, you can use software such as goldwave player. As long as amended c documents in the macros, can generate the sine wave frequency. Silentecho works.

wav_generator
.............\ReadMe.txt
.............\StdAfx.cpp
.............\StdAfx.h
.............\wav_generator.cpp
.............\wav_generator.dsp
.............\wav_generator.dsw
.............\wav_generator.ncb
.............\wav_generator.opt
.............\wav_generator.plg

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