sudo add-apt-repository ppa:mc3man/trusty-media
sudo apt-get update
sudo apt-get install ffmpeg

sudo curl https://yt-dl.org/downloads/2015.07.28/youtube-dl -o /usr/local/bin/youtube-dl
sudo chmod a+rx /usr/local/bin/youtube-dl

sudo apt-get install dos2unix
dos2unix cronjob/queue_helper.sh

sudo apt-get install libapache2-mod-xsendfile

XSendFile on
XSendFilePath "/path/to/youtube2mp3/converted"

crontab -e

0 * * * * /usr/bin/php /vagrant/sites/youtube2mp3/cronjob/delete_checker.php
* * * * * /bin/sh /vagrant/sites/youtube2mp3/cronjob/queue_helper.sh

sudo apt-get install mp3gain

# MPEG Layer 3 sound files
0       beshort     &0xffe0     audio/mpeg
!:mime  audio/mpeg
# MP3 with ID3 tag
0       string      ID3     audio/mpeg
!:mime  audio/mpeg