audio_to_visual.sh

audio_to_visual.sh

#!/bin/bash

# A script to make a trippy GIF of a RAW file
# Shared w/ Dogbotic's "Ear Re-Training" class

# REQUIREMENTS: imagemagick, command-line familiarity

{

# Not all dimensions work well. I think depth can also be 16, 8, 4, etc
width="768"
height="1024"
depth="32"

input_slug="9" # the 9 in 9.raw, as renamed from "9 Audio Track.aiff"

# A function that takes a "modulus" and uses it to create a PNG of the RAW image
# IDK what it's actually doin!
# https://legacy.imagemagick.org/Usage/transform/#evaluate
function convert_with_modulus() {
    printf -v modulus "%02d" $i

    echo "$input_slug-$depth-${width}x${height}-$modulus.png"

    convert \
        -size "${width}x${height}" \
        -depth "$depth" \
        uyvy:"$input_slug.raw" \
        -colorspace sRGB \
        -evaluate AddModulus "$modulus%" \
        -define quantum:format=signed \
        -auto-level \
        "$input_slug-$depth-${width}x${height}-$modulus.png"

    echo
}

# Call the above function 100 times, passing 0 to 99
# (Conveniently, 0 and 100 have identical outputs, so loop will be seamless)
modulus_start=0
modulus_end=99
for i in $(seq $modulus_start $modulus_end); do
    convert_with_modulus $i
done

# I have another script that compiles all the PNGs generated in ^
# and spits out a bunch of GIFs at different compressions and an MP4, but the
# crux of it is really a call to imagemagick's convert (25 is the framerate):
convert "*.png" -set delay "1x25" "track_9-RARE_NFT-poor_image-25.gif"

}