A quick way to generate spectrograms for a bunch of audio files

makeSpectrogram.sh

### Generate PNG spectrograms using SoX
### Use the input file name as the title within the image as well as the output file name
### Set the width to 2000 (seems to output a ~2140px wide image)

### Generate for five arguments, 
### arg 1 = file type to make spectrograms from, e.g. .wav,
### arg 2 = width of the spectrogram 
### arg 3 = hight of the spectrogram
### arg 4 = the dB level of sounds to pick out, ignoring sounds below that threshold
### arg 5 = the frequencies to hone in on e.g. 4k will give you a spectrogram that draws sounds up to 2k
### usage: bash makeSpectrogram.sh wav 900 600 70 4k, renders a spectrogram 900*600 pixels from every wav file 
### in your folder focusing on frequenceies below 2k and sounds crossing the 70dB threshold

for file in *.$1;do
outfile="${file%.*}.png"
title_in_pic="${file%.*} $5 all sound above $4dB"
sox "$file" -r $5 -n rate spectrogram -t "$title_in_pic" -x $2 -y $3 -z $4 -o "$outfile" 
done

modded script to include arguments for
file type
width of spectrogram
frequency range
e.g.: bash makeSpectrogram.sh wav 900 4k, renders a spectrogram 1044 pixels wide from every wav file in your folder focusing on frequenceies below 2k