.. _raspberrypi-installation:

****************************
Installation on Raspberry Pi
****************************

Mopidy runs nicely on a `Raspberry Pi <http://www.raspberrypi.org/>`_. As of
January 2013, Mopidy will run with Spotify support on both the armel
(soft-float) and armhf (hard-float) architectures, which includes the Raspbian
distribution.

.. image:: /_static/raspberry-pi-by-jwrodgers.jpg
    :width: 640
    :height: 427


.. _raspi-wheezy:

How to for Debian 7 (Wheezy)
============================

#. Download the latest wheezy disk image from
   http://downloads.raspberrypi.org/images/debian/7/. I used the one dated
   2012-08-08.

#. Flash the OS image to your SD card. See
   http://elinux.org/RPi_Easy_SD_Card_Setup for help.

#. If you have an SD card that's >2 GB, you don't have to resize the file
   systems on another computer. Just boot up your Raspberry Pi with the
   unaltered partions, and it will boot right into the ``raspi-config`` tool,
   which will let you grow the root file system to fill the SD card. This tool
   will also allow you do other useful stuff, like turning on the SSH server.

#. You can login to the default user using username ``pi`` and password
   ``raspberry``. To become root, just enter ``sudo -i``.

#. To avoid a couple of potential problems with Mopidy, turn on IPv6 support:

   - Load the IPv6 kernel module now::

         sudo modprobe ipv6

   - Add ``ipv6`` to ``/etc/modules`` to ensure the IPv6 kernel module is
     loaded on boot::

         echo ipv6 | sudo tee -a /etc/modules

#. Installing Mopidy and its dependencies from `apt.mopidy.com
   <http://apt.mopidy.com/>`_, as described in :ref:`installation`. In short::

       wget -q -O - http://apt.mopidy.com/mopidy.gpg | sudo apt-key add -
       sudo wget -q -O /etc/apt/sources.list.d/mopidy.list http://apt.mopidy.com/mopidy.list
       sudo apt-get update
       sudo apt-get install mopidy

#. Since I have a HDMI cable connected, but want the sound on the analog sound
   connector, I have to run::

       amixer cset numid=3 1

   to force it to use analog output. ``1`` means analog, ``0`` means auto, and
   is the default, while ``2`` means HDMI. You can test sound output
   independent of Mopidy by running::

       aplay /usr/share/sounds/alsa/Front_Center.wav

   If you hear a voice saying "Front Center", then your sound is working.

   To make the change to analog output stick, you can add the ``amixer``
   command to e.g. ``/etc/rc.local``, which will be executed when the system is
   booting.


Fixing audio quality issues
===========================

As of January 2013, some reports also indicate that pushing the audio through
PulseAudio may help. We hope to, in the future, provide a complete set of
instructions here leading to acceptable analog audio quality.