https://blog.faceutil.com/2017/03/25/%ec%bf%a8%ec%97%90%eb%94%94%ed%8a%b8-%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-cool-edit-pro-%eb%ac%b4%ec%84%a4%ec%b9%98-mp3-%eb%85%b8%eb%9e%98-%ed%8e%b8%ec%a7%91-%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%a8/