This compressed package contains two programs, one for recording the program, and the other for playback program, are using MATLAB, you can change the frequency of collection and the specified playback signal frequency. Digital signal processing is used to learn a little practice. Welcome to try to run, and further modified.

录音和放音程序 MATLAB\play_sound.m
.....................\rec_sound.m
录音和放音程序 MATLAB

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