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08. Further optimisation & options
Check mpd version:
sudo mpd -V
Recommended changes to the mpd.conf file in /etc directory Comment out the state_file to disable the resuming of last state when mpd starts up
#state_file "/var/lib/mpd/state"
Set the bind_to_address to be any, to enable you to connect external mpd clients
bind_to_address "any"
Set the Audio Output
audio_output {
type "alsa"
name "My ALSA Device"
device "hw:0,0" # optional
#format "44100:16:2" # optional
#mixer_device "default" # optional
#mixer_control "PCM" # optional
#mixer_index "0" # optional
}
If you are using a USB DAC that does not support hardware volume control you can try enabling software volume control
mixer_type "software"
If you are feeling adventurous you can try compiling the latest version of mpd:
Install MPD and MPC (Client)
sudo apt-get install mpd mpc
Install the pre-requirements
sudo apt-get install aptitude wget binutils gcc make subversion autoconf automake autotools-dev libtool pkg-config build-essential libncurses5-dev libncursesw5-dev gcc libglib2.0-dev
sudo apt-get install libfaad2 libfaad-dev libflac8 libflac-dev libogg0 libogg-dev libvorbis0a libvorbis-dev libid3tag0 libid3tag0-dev libmad0 libmad0-dev libcue-dev libcue1 libasound2 libasound-dev libasound2-dev libao-dev libwavpack-dev libwavpack1 libsamplerate0 libsamplerate-dev libmikmod2-dev libmikmod2 libmikmod-dev libshout-dev libavformat-dev libavcodec-dev libavutil-dev libaudiofile-dev libcurl4-openssl-dev libmms-dev libmms0 libtwolame-dev libtwolame0 libmp3lame-dev git-core libboost1.46-all
sudo su
cd /home/pi
Get the latest version from http://www.musicpd.org/download/mpd/stable/
Like this
wget http://www.musicpd.org/download/mpd/stable/mpd-0.19.2.tar.gz
And then extract the files
tar -zxvf <name>.tar.gz
Then
cd mpd-0.19.2
./autogen.sh
Configure some options
./configure --disable-bzip2 --disable-iso9660 --disable-zzip --enable-id3 --disable-sqlite --enable-ffmpeg --enable-alsa --disable-wave-encoder --enable-pipe-output --enable-httpd-output --disable-recorder-output --disable-sndfile --enable-oss --enable-shout --disable-pulse --disable-ao --enable-mad --disable-inotify --disable-ipv6 --enable-curl --enable-mms --enable-wavpack --disable-lame-encoder --disable-twolame-encoder --enable-vorbis --enable-lsr --enable-mikmod --with-zeroconf=auto
make
make install
/etc/init.d/mpd stop
echo DAEMON=/usr/local/bin/mpd >>/etc/default/mpd
/etc/init.d/mpd start
su pi
cd
Open the interfaces file
sudo nano /etc/network/interfaces
Edit the file to make the file look like this
auto lo
iface lo inet loopback
iface eth0 inet dhcp
allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp
wireless-power off
Open the supplicant file
sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
Edit the fie like this
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
ssid="mywlan"
proto=WPA RSN
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=CCMP TKIP
psk="mypassword"
}
Check the configuration after reboot
iwconfig
References:
http://blog.scphillips.com/2013/01/sound-configuration-on-raspberry-pi-with-alsa/
Check active usb devices:
lsusb
Check sound cards:
aplay -l
aplay -L
Volume control:
get the sound card info first:
amixer info
get the id for the volume control
amixer controls
get the current volume level
amixer cget numid=2 #numid should be the number found in the previous step
set the volume to maximum
sudo amixer cset numid=2 100%
fix the current soundcard settings in the configuration file
sudo alsactl store
Adding a real time clock only makes sense if you want to use your player in a multi-room environment. The Songcast source can be a Mac or PC or a Linn DS player. be aware that all your players need to have the real time clock.
Get the Piface Real Time Clock mini board from www.farnell.com. You can get more information on the Piface web site:
The little board can be put over the GPIO pins of the Raspberry Pi. No soldering is needed and the pins will continue to be available for other peripherals.
The links in the PiFace documentation don't work well, so just follow the instructions below.
You will first need to make sure the Raspberry Pi is set to the right time.
sudo raspi-config
Make sure to set the right time zone for your Pi under Internationalisation Options.
Then select Advanced Options. Now select I2C. Make sure I2C is used and loaded at boot time.
Now install the software:
sudo nano install-piface-real-time-clock.sh
Enter the text below
#!/bin/bash
#: Description: Enables the required modules for PiFace Clock.
#=======================================================================
# NAME: set_revision_var
# DESCRIPTION: Stores the revision number of this Raspberry Pi into
# $RPI_REVISION
#=======================================================================
set_revision_var() {
rev_str=$(grep "Revision" /proc/cpuinfo)
# get the last character
len_rev_str=${#rev_str}
chr_index=$(($len_rev_str-1))
chr=${rev_str:$chr_index:$len_rev_str}
if [[ $chr == "2" || $chr == "3" ]]; then
RPI_REVISION="1"
else
RPI_REVISION="2"
fi
}
#=======================================================================
# NAME: enable_module
# DESCRIPTION: Enabled the I2C module.
#=======================================================================
enable_module() {
echo "Enabling I2C module."
module="i2c-bcm2708"
modules_file="/etc/modules"
# if $module not in $modules_file: append $module to $modules_file.
if ! grep -q $module $modules_file; then
echo $module >> $modules_file
fi
}
#=======================================================================
# NAME: start_on_boot
# DESCRIPTION: Load the I2C modules and send magic number to RTC, on boot.
#=======================================================================
start_on_boot() {
echo "Changing /etc/rc.local to load time from PiFace Clock."
# remove exit 0
sed -i "s/exit 0//" /etc/rc.local
if [[ $RPI_REVISION == "1" ]]; then
i=0 # i2c-0
else
i=1 # i2c-1
fi
cat >> /etc/rc.local << EOF
modprobe i2c-dev
modprobe i2c:mcp7941x
echo mcp7941x 0x6f > /sys/class/i2c-dev/i2c-$i/device/new_device
hwclock -s
EOF
}
#=======================================================================
# MAIN
#=======================================================================
# check if the script is being run as root
if [[ $EUID -ne 0 ]]
then
printf 'This script must be run as root.\nExiting..\n'
exit 1
fi
RPI_REVISION=""
set_revision_var &&
enable_module &&
start_on_boot &&
printf 'Please *reboot* and then set your clock with:
sudo date -s "14 JAN 2014 10:10:30"
'
Ctrl-X, Y, Enter
sudo chmod +x install-piface-real-time-clock.sh
sudo ./install-piface-real-time-clock.sh
sudo reboot
That's it! You don't need to set the time as the time was already correctly set through rasps-config.
Source: Debian CPU Frequency Scaling
You may want to use this in case you have a player that disappears from the network, for instance when you use a wifi connection. The settings described here will put the Raspberry Pi in performance mode all the time. Combined with switched off power management for the wifi dongle, this will give you the best availability of the player.
I have found that this setting is not necessary for a player connected through an ethernet cable.
Check the current setting:
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
Set up automatic setting:
sudo apt-get install cpufrequtils sysfsutils
sudo nano /etc/default/cpufrequtils
Make sure the file contains the following text:
# valid values: userspace conservative powersave ondemand performance
# get them from cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
GOVERNOR="performance"
Configure sysfs:
sudo nano /etc/sysfs.conf
Add the following line at the end of the file:
devices/system/cpu/cpu0/cpufreq/scaling_governor = performance
And reboot
sudo reboot
The following commands are available
'setStandbyMode?value=<true or false>' - Set the StandyMode
'getStandbyMode' - Get the Current StandbyMode
'nextTrack' - Play the Next Track in Playlist
'previousTrack' - Play the Previous Track, if track has played for more than 5 secs current track is started again
'stopTrack' - Stop the Current Track
'pauseTrack' - Pauses the Current Track
'playTrack' - Plays the Current Track, if Paused will resume, if track not playing will attempt to play Next Track
'incVolume' - Increase the Volume
'incVolume' - Decrease the Volume
'muteVolume?value=<true or false>' - Mute the Volume
'changeSource?value=' - Change the Source
'getSourceName' - Source Name
'getPlayerStatus' - Current Status of the Player
'setVolume?value=<x>' - Set the Volume, value between 0 and 100
'radioNextChannel' - play the next radio channel
'radioPreviousChannel' - play the previous radio channel
The commands can be activated with curl:
curl http://localhost:8088/myapp/mediaplayer/setStandbyMode?value=true
For an application of this, see the description for a small integrated digital streamer (DSi).
Source: Integrate LIRC in Mediaplayer
Before you create your own lirc configuration file for your remote, check this link for configuration files:
Lirc Remotes Configuration Files
Install lirc
sudo apt-get install lirc
Edit the /etc/modules file
sudo nano /etc/modules
Add the following two lines, choosing the GPIO pins that are not already being used
lirc_dev
lirc_rpi gpio_in_pin=23 gpio_out_pin=14
or use any other free pins.
Edit your /etc/lirc/hardware.conf file
sudo nano /etc/lirc/hardware.conf
To be:
########################################################
# /etc/lirc/hardware.conf
#
# Arguments which will be used when launching lircd
LIRCD_ARGS="--uinput"
# Don't start lircmd even if there seems to be a good config file
# START_LIRCMD=false
# Don't start irexec, even if a good config file seems to exist.
# START_IREXEC=false
# Try to load appropriate kernel modules
LOAD_MODULES=true
# Run "lircd --driver=help" for a list of supported drivers.
DRIVER="default"
# usually /dev/lirc0 is the correct setting for systems using udev
DEVICE="/dev/lirc0"
MODULES="lirc_rpi"
# Default configuration files for your hardware if any
LIRCD_CONF=""
LIRCMD_CONF=""
########################################################
Restart lirc to pickup theses changes (sometimes a reboot is needed)
sudo /etc/init.d/lirc stop
sudo /etc/init.d/lirc start
To test if you are receiving IR signals
sudo /etc/init.d/lirc stop
mode2 -d /dev/lirc0
You should see something like this:
space 16777215
pulse 14131078
space 8687
pulse 4599
space 657
pulse 1656
space 648
pulse 505
space 600
pulse 1710
space 653
pulse 507
space 593
pulse 559
To List the IR commands you can program enter
irrecord --list-namespace
To create a config file, first stop lirc
sudo /etc/init.d/lirc stop
The put lirc into record mode
irrecord -d /dev/lirc0 ~/lircd.conf
And follow the instructions.
You should end up with a config file similar to:
#
# contributed by
#
# brand: /root/lircd.conf
# model no. of remote control:
# devices being controlled by this remote:
#
begin remote
name TEAC_H300
bits 16
flags SPACE_ENC
eps 30
aeps 100
header 8682 4597
one 646 1664
zero 646 508
ptrail 616
repeat 9263 2290
pre_data_bits 16
pre_data 0xA156
gap 40067
repeat_gap 95502
toggle_bit_mask 0x0
begin codes
KEY_POWER 0xE916
KEY_POWER2 0xA156C936
KEY_VOLUMEDOWN 0x7986
KEY_VOLUMEUP 0xF906
KEY_KP1 0xA956
KEY_KP2 0x29D6
KEY_KP3 0x31CE
KEY_KP4 0x24DB
KEY_KP5 0xB14E
KEY_KP6 0x8976
end codes
end remote
Copy this to /etc/lirc/lircd.conf
sudo cp lircd.con /etc/lirc/lircd.conf
Install the MediaPlayer LIRC plugin in the mediaplayer/plugins directory.
In mediaplayer/plugins/LIRC directory should be two files:
LIRCIntegration.jar LIRCConfig.xml
The LIRCConfig.xml maps the mediaplayer events to the lirc commands.
At the moment there are two types of events:
Volume (Up/Down)
SourceChanged (Name of Source as configured in the InputSources.xml file)
StandbyChanged (true (in Standby) or false(not in Standby))
My LIRCConfig.xml looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<Mappings>
<Mapping>
<Event>VolumeInc</Event>
<Command>irsend SEND_ONCE MM1 KEY_VOLUMEUP</Command>
<!-- Command>notepad.exe UP</Command -->
</Mapping>
<Mapping>
<Event>VolumeDec</Event>
<Command>irsend SEND_ONCE MM1 KEY_VOLUMEDOWN</Command>
<!-- Command>notepad.exe DOWN</Command -->
</Mapping>
<Mapping>
<Event>StandbyChanged</Event>
<Name>true</Name>
<Command>irsend SEND_ONCE TEAC_H300 KEY_POWER</Command>
</Mapping>
<Mapping>
<Event>StandbyChanged</Event>
<Name>false</Name>
<Command>irsend SEND_ONCE TEAC_H300 KEY_POWER</Command>
</Mapping>
</Mappings>
If you are having trouble creating the lircd.conf file, run irrecord in raw mode:
irrecord --force -d /dev/lirc0 ~/lircd.conf
Source: Raspberry Pi Device Tree
Edit config.txt in /boot :
sudo nano /boot/config.txt
Edit the file as necessary:
# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on
# Uncomment one of these lines to enable an audio interface
#dtoverlay=hifiberry-amp
#dtoverlay=hifiberry-dac
#dtoverlay=hifiberry-dacplus
#dtoverlay=hifiberry-digi
#dtoverlay=iqaudio-dac
#dtoverlay=iqaudio-dacplus
# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi
# Uncomment this to override the defaults for the lirc-rpi module
#dtparam=gpio_out_pin=16
#dtparam=gpio_in_pin=17
#dtparam=gpio_in_pull=down
If you have problems controlling an external amp with the LIRC plugin for mediaplayer, you can try the following:
Test if you are using the correct name for the remote control you want to emulate:
irsend LIST "" ""
This should list the name of your remote control. If the name is incorrect, check the lircd.conf file in /etc/lirc.
Send a command to the external device:
irsend SEND_ONCE CLASSIK KEY_VOLUMEUP
(Change the name of the remote and the name of the command as required)
Source: http://ozzmaker.com/check-raspberry-software-hardware-version-command-line/
cat /proc/cpuinfo
| MODEL AND PI REVISION | 256MB | HARDWARE REVISION CODE FROM CPUINFO |
|---|---|---|
| Model B Revision 1.0 | 256MB | 0002 |
| Model B Revision 1.0 + ECN0001 (no fuses, D14 removed) | 256MB | 0003 |
| Model B Revision 2.0 | 256MB | 0004 |
| Mounting holes | 0005 | |
| 0005 | ||
| 0006 | ||
| Model A | 256MB | 0007 |
| Mounting holes | 256MB | 0007 |
| 0008 | ||
| 0009 | ||
| Model B Revision 2.0 | 512MB | 000d |
| Mounting holes | 000e | |
| 000f | ||
| Model B+ | 512MB | 0010 |
| Compute Module | 512MB | 0011 |
| Model A+ | 256MB | 0012 |
| Pi 2 Model B | 1GB | a01041 (Sony, UK) |
| a21041 (Embest, China) | ||
| PiZero | 512MB | 900092(no camera connector) |
| 900093(camera connector) | ||
| Pi 3 Model B | 1GB | a02082 (Sony, UK) |
| a22082 (Embest, China) |
Kernel info:
name -a
Download Microsoft Remote Desktop on your PC or MAC
On the Raspberry Pi:
sudo apt-get install xrdp
Now use Remote Desktop to access your RPi.
More info: http://www.raspberrypiblog.com/2012/10/how-to-setup-remote-desktop-from.html