Tomwi

/* fix_fft.c - Fixed-point in-place Fast Fourier Transform  */
/*
  All data are fixed-point short integers, in which -32768
  to +32768 represent -1.0 to +1.0 respectively. Integer
  arithmetic is used for speed, instead of the more natural
  floating-point.

  For the forward FFT (time -> freq), fixed scaling is
  performed to prevent arithmetic overflow, and to map a 0dB
  sine/cosine wave (i.e. amplitude = 32767) to two -6dB freq

dofuuz

# Audacity spectrogram colormap data
# https://github.com/dofuuz/audacity-colormap

audaspec_data = [
    [0.000009, 0.000025, 0.000020],
    [0.000227, 0.000394, 0.000344],
    [0.000630, 0.001132, 0.000994],
    [0.001157, 0.002212, 0.001945],
    [0.001770, 0.003620, 0.003193],
    [0.002441, 0.005351, 0.004740],