FFMPEG reduce audio sample rate (AIFF, WAV)

audio-reduce-sample-rate.sh

#!/bin/bash

toConvertFolder="to-convert/"
convertedFolder="converted/"
maxKhz=48000

mkdir -p $convertedFolder

formats=( "aiff" "wav" )
for i in "${formats[@]}"
do
        # Reduce sample rate
        find $toConvertFolder -type f -name "*.${i}" | while read line; do
                tempFilename="${line/%.${i}/-temporary.${i}}"
                mv "${line}" "${tempFilename}"
                ffmpeg -y -nostdin -i "${tempFilename}" -ar $maxKhz -write_id3v2 1 -c:v copy "${line}" && rm "${tempFilename}" && mv "${line}" "${convertedFolder}"
                mv "${tempFilename}" "${line}" 2>/dev/null
        done
done