Sox,“瑞士军刀的音频操纵”,可以从声音文件中产生准确的PNG谱图.它几乎播放任何东西,二进制文件可用于Windows.在最基本的层面上,你会使用这样的东西：
sox my.wav -n spectrogram
如果你想要一个没有轴,标题,图例和100px高的浅色背景的谱图：
sox "Me,London.mp3" -n spectrogram -Y 130 -l -r -o "Me,London.png"
如果您只想分析一个通道,Sox就可以接受很多选择.如果您需要您的视觉效果更加冷静,您可以对所得的PNG进行后处理.
以下是命令行中关于所有可用参数的简要概述,manpage has more details：
-x num X-axis size in pixels; default derived or 800 -X num X-axis pixels/second; default derived or 100 -y num Y-axis size in pixels (per channel); slow if not 1 + 2^n -Y num Y-height total (i.e. not per channel); default 550 -z num Z-axis range in dB; default 120 -Z num Z-axis maximum in dBFS; default 0 -q num Z-axis quantisation (0 - 249); default 249 -w name Window: Hann (default),Hamming,Bartlett,Rectangular,Kaiser -W num Window adjust parameter (-10 - 10); applies only to Kaiser -s Slack overlap of windows -a Suppress axis lines -r Raw spectrogram; no axes or legends -l Light background -m Monochrome -h High colour -p num Permute colours (1 - 6); default 1 -A Alternative,inferior,fixed colour-set (for compatibility only) -t text Title text -c text Comment text -o text Output file name; default `spectrogram.png' -d time Audio duration to fit to X-axis; e.g. 1:00,48 -S time Start the spectrogram at the given time through the input
