File counter grouped by file extension (v2), tailored for audio files. Will now ignore files and folders starting with a dot (.).

audio-file-extension-check-v2.sh

#!/usr/bin/env bash

echo "File type count:"
fileExtensions=( aiff mp3 wav m4a flac alac )

totalFileCount=$(find . -type f \( -name "*.aiff" -o -name "*.mp3" -o -name "*.wav" -o -name "*.m4a" -o -name "*.flac" -o -name "*.alac" \) -not -path "*/\.*" | wc -l)

for fileExtension in "${fileExtensions[@]}"
do
	fileCount=$(find . -type f -name "*.${fileExtension}" -not -path "*/\.*" | wc -l)
	
	if [ $totalFileCount -eq 0 ]; then
		roundedPercent=0
	else
		percent=`echo "$fileCount * 100 / $totalFileCount" | bc -l`
		roundedPercent=`printf "%.0f" $percent`
	fi
	
	echo "${fileExtension}: ${fileCount} files (${roundedPercent}%)"
done

echo ""
echo "File extensions found in directory (excluding hidden files/directories):"
echo $(find . -type f -not -path "*/\.*" -name '*.*' | sed 's|.*\.||' | sort -u)