musicdsp source code archive-Analysis Beat Detector Class Coefficients for Daubechies wavelets 1-38 DFT Envelope detector Envelope Detector class (C++) Envelope follower with different attack and release Fast in-place Walsh-Hadamard Tra

dft fft used in read audio file

利用经典的Cooley-Tukey基2算法求复序列的DFT。Cooley-Tukey提出的FFT使N点DFT的乘法计算量有N^2次降为N/2*log2（N）次。-The use of classical Cooley-Tukey algorithm for radix-2 complex DFT sequence. FFT Cooley-Tukey presented enables multiplication of the amount of N-point DFT has N ^ 2 ti