Install as a daemon

Ubuntu

   cd ~/headphones
   sudo touch /etc/default/headphones
   Adjust settings in /etc/default/headphones (installpath and run as user)
   sudo chmod +x init-scripts/init.ubuntu
   sudo ln -s /opt/headphones/init.ubuntu /etc/init.d/headphones
   (optional) sudo adduser --system --no-create-home headphones
   (optional) sudo chown headphones:nogroup -R /opt/headphones
   sudo update-rc.d headphones defaults  
   sudo service headphones start | stop | reload | restart

Synology

   Go to your DSM > Users > Create user and create user "headphones"  
   chown -R headphones:users /volume1/@appstore/headphones
   wget -O /opt/etc/init.d/S99headphones.sh http://dl.dropbox.com/u/5653370/syn_files/headphones/S99headphones.sh  
   chmod a+x /opt/etc/init.d/S99headphones.sh  
   /opt/etc/init.d/S99headphones.sh start | stop | restart | update

Mac OS X

Tested on Mac OS X 10.8.2. Create the following file: ~/Library/LaunchAgents/com.rembo10.headphones.plist

Now copy-paste the below and update the path to headphones.py.

   <?xml version="1.0" encoding="UTF-8"?>
   <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
   <plist version="1.0">
   <dict>
          <key>Label</key>
          <string>com.rembo10.headphones</string>
          <key>ProgramArguments</key>
          <array>
                 <string>/usr/bin/python</string>
                 <string>/path/to/headphones/Headphones.py</string>
          </array>
          <key>KeepAlive</key>
          <true/>
   </dict>
   </plist>

To start/stop the service manually, run:

   launchctl load ~/Library/LaunchAgents/com.rembo10.headphones.plist
   launchctl unload ~/Library/LaunchAgents/com.rembo10.headphones.plist

Consider turning off the setting Launch Browser on Startup so it doesn't launch when starting your computer.