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1. create a tone

2. convert to raw

sox tone_440hz.wav -b 16 -c 1 -r 44100 -t raw file.raw

3. concert to image

convert -depth 8 -size 1000x1000 rgb:file.raw file.jpg

RAW Loop

#!/bin/bash

counter=1
while [ $counter -le 10 ]
do

sox -r $((1000-$counter)) -e unsigned -b 8 -c 2  tone.wav tone.raw
convert -depth 8 -size $((400-$counter*20))x$((400-$counter*20)) rgb:tone.raw tone.gif
cp tone.gif tone$counter.gif
cp tone.gif toneNeu.raw
sox -r $((85000-$counter)) -e unsigned -b 8 -c 1  toneNeu.raw tone.wav

((counter++))
done
echo All done