一個音樂分頻程式，以c++寫成。內含一個將音樂轉成純數字的源碼，一個分頻源碼(用FFT的overlap-and-add技術寫成)，一個把不同頻率加起來的源碼(確認分頻正確)。-A filter bank using FFT overlap-and-add with a transformer that transfer the wav file into txt file and a checker that ensure the filter is correct.

因为种种原因，最近需要把原始的wav文件压缩成ADPCM格式。但是网上几乎搜不到相关的中文资料。花了相当长的时间，七拼八凑的从一些文章中得到了些信息，终于搞定了它。为了方便遇到跟我一样麻烦的人，我决定把它详细的写下来。 - For various reasons, most recently the need to compress the original wav file into ADPCM format. But Chinese Internet almost found the