155 lines
5.2 KiB
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155 lines
5.2 KiB
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.. _raspberrypi-installation:
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****************************
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Installation on Raspberry Pi
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****************************
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Mopidy runs nicely on a `Raspberry Pi <http://www.raspberrypi.org/>`_. As of
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January 2013, Mopidy will run with Spotify support on both the armel
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(soft-float) and armhf (hard-float) architectures, which includes the Raspbian
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distribution.
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.. image:: raspberry-pi-by-jwrodgers.jpg
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:width: 640
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:height: 427
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.. _raspi-wheezy:
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How to for Raspbian "wheezy" and Debian "wheezy"
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================================================
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This guide applies for both:
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- Raspian "wheezy" for armhf (hard-float), and
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- Debian "wheezy" for armel (soft-float)
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If you don't know which one to select, go for the armhf variant, as it'll give
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you a lot better performance.
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#. Download the latest "wheezy" disk image from
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http://www.raspberrypi.org/downloads/. This was last tested with the images
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from 2013-05-25 for armhf and 2013-05-29 for armel.
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#. Flash the OS image to your SD card. See
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http://elinux.org/RPi_Easy_SD_Card_Setup for help.
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#. If you have an SD card that's >2 GB, you don't have to resize the file
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systems on another computer. Just boot up your Raspberry Pi with the
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unaltered partions, and it will boot right into the ``raspi-config`` tool,
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which will let you grow the root file system to fill the SD card. This tool
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will also allow you do other useful stuff, like turning on the SSH server.
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#. You can login to the default user using username ``pi`` and password
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``raspberry``. To become root, just enter ``sudo -i``.
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#. To avoid a couple of potential problems with Mopidy, turn on IPv6 support:
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- Load the IPv6 kernel module now::
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sudo modprobe ipv6
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- Add ``ipv6`` to ``/etc/modules`` to ensure the IPv6 kernel module is
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loaded on boot::
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echo ipv6 | sudo tee -a /etc/modules
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#. Installing Mopidy and its dependencies from `apt.mopidy.com
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<http://apt.mopidy.com/>`_, as described in :ref:`installation`. In short::
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wget -q -O - http://apt.mopidy.com/mopidy.gpg | sudo apt-key add -
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sudo wget -q -O /etc/apt/sources.list.d/mopidy.list http://apt.mopidy.com/mopidy.list
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sudo apt-get update
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sudo apt-get install mopidy
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Note that this will only install the main Mopidy package. For e.g. Spotify
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or SoundCloud support you need to install the respective extension packages.
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To list all the extensions available from apt.mopidy.com, you can run::
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apt-cache search mopidy
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To install one of the listed packages, e.g. ``mopidy-spotify``, simply run::
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sudo apt-get install mopidy-spotify
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For a full list of available Mopidy extensions, including those not
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installable from apt.mopidy.com, see :ref:`ext`.
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#. Since I have a HDMI cable connected, but want the sound on the analog sound
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connector, I have to run::
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sudo amixer cset numid=3 1
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to force it to use analog output. ``1`` means analog, ``0`` means auto, and
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is the default, while ``2`` means HDMI. You can test sound output
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independent of Mopidy by running::
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aplay /usr/share/sounds/alsa/Front_Center.wav
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If you hear a voice saying "Front Center", then your sound is working.
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To make the change to analog output stick, you can add the ``amixer``
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command to e.g. ``/etc/rc.local``, which will be executed when the system is
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booting.
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Fixing audio quality issues
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===========================
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As of about April 2013 the following steps should resolve any audio
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issues for HDMI and analog without the use of an external USB sound
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card.
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#. Ensure your system is up to date. On Debian based systems run::
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sudo apt-get update
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sudo apt-get dist-upgrade
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#. Ensure you have a new enough firmware. On Debian based systems
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`rpi-update <https://github.com/Hexxeh/rpi-update>`_
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can be used.
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#. Update either ``~/.asoundrc`` or ``/etc/asound.conf`` to the
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following::
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pcm.!default {
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type hw
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card 0
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}
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ctl.!default {
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type hw
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card 0
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}
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Note that if you have an ``~/.asoundrc`` it will overide any global
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settings from ``/etc/asound.conf``.
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#. Update your ``~/.config/mopidy/mopidy.conf`` to contain::
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[audio]
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output = alsasink
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This is to tell GStreamer not to pick Jack which it seems to like picking on
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Raspberry Pis for some reason.
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Following these steps you should be able to get crackle free sound on either
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HDMI or analog. Note that you might need to ensure that PulseAudio is no longer
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running to get this working nicely.
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This recipe has been confirmed as working by a number of users on our issue
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tracker and IRC. As a reference, the following versions where used for testing
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this, however all newer and some older version are likely to work as we have
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not determined the exact revision that fixed this::
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$ uname -a
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Linux raspberrypi 3.6.11+ #408 PREEMPT Wed Apr 10 20:33:39 BST 2013 armv6l GNU/Linux
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$ /opt/vc/bin/vcgencmd version
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Apr 25 2013 01:07:36
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Copyright (c) 2012 Broadcom
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version 386589 (release)
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The only remaining known issue is a slight gap in playback at track changes
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this is likely due to gapless playback not being implemented and is being
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worked on irrespective of Raspberry Pi related work.
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