Normalizing your democracy / miro podcast volumes automatically

Heres a handy script I use to normalize and compress the audio in podcasts downloaded by my Democracy / Miro player.

This is much nicer when im sitting at my desk working and listening, i dont need to fiddle with the volume-knob mid sub-routine when i'm coding, very handy for smoothing out audio in news feeds where they have a loud news banner/jingle/intro sound followed by various voices.

This just runs at cronjob using 'normalize-audio' audio package


apt-get install normalize-audio


My script keeps a list of jobs that were normalized so they dont get run again, and simply greps to see if they need doing or not


#!/bin/bash

find $HOME/.democracy|grep -i mp3$|while read fname
do
grep -q "$fname" $HOME/.democracy/normalized.db
if [ $? -eq 1 ]
then
normalize-audio -q "$fname" >> $HOME/.democracy/normalized-log.txt
echo "`date` $fname" >> $HOME/.democracy/normalized.db
fi
done


save this to scripts/normalize-audio and dont forget to chmod +x it


chmod +x scripts/normalize-audio


In my cronjob for this which you create by running the follow command as your user.


crontab -e


I simply have


17 * * * * scripts/normalize-democracy


:)

happy listening!