www.gusucode.com > 声音的处理有：LPC，FFT，共振峰，频谱源码程序 > siganlandsystemusingMatlab/SSUM/library/spectrogram.m

    function [spectrum, bin, st] = spectrogram(audiodata, fftsize, window_shape)

    windowdata = get_windowdata(fftsize, window_shape);
    [spectrum, bin, st] = specgram(audiodata.data, fftsize, audiodata.Fs, windowdata);