Liebe Forumsmitglieder
ich bitte um Eure Hilfe.
Zu mir:
Ich bin ein absoluter Neuling – seit kurzem in Rente habe ich mir zum Ziel gesetzt wieder wie in meiner Jugend mich mit Elektronik zu beschäftigen. Ich versuche gerade das Buch „Raspberry Pi“ von Kofler, Kühnast, Scherbeck durchzuarbeiten, und bin beim Kapitel 7 „Audio Player mit Smartphone - Fernbedingung“ hängen geblieben. Dort geht es darum den mpd mit Xfmpc zum Laufen zu bringen.
Wo stehe ich?
- Xfmpc erkennt den MPD und kann ihn steuern
- der MPD findet die die mp3 Dateien und scheint sie abzuspielen (der Fortschritts-Balken bewegt sich)
- aber ich bekomme keinen Ton aus meinem Lautsprecher
- Der (Mono-) Lautsprecher ist an der 3,5mm Buchse des Raspi,
- der VLC Player funktioniert über diesen Lautsprecher; ebenso kann ich webradio abspielen https://www.radio.de/ - d.h. Soundkarte, Lautsprecher etc scheinen zu funktionieren.
Seit 3 Tagen suche ich Lösungen im Internet (und im Forum) – ohne Erfolg – wäre toll, wenn mir jemand helfen würde.
Heute habe ich den Raspi neu aufgesetzt: SD Karte beschrieben mit Raspberry Pi Imager v 1.4 von der Seite raspberrypi.org(also kein noobs)
und anschliessend MPD installiert nach folgendem Tutorial: Music Player Daemon (MPD und MPC) auf dem Raspberry Pi
Ausnahme: den Schritt 2. Playlists für Online Streams – habe ich ausgelassen, da ich momentan keine online streams verwenden möchte
Mir scheint das Problem liegt bei der „Audio output“ Festlegung von mpd.conf – siehe Datei unten.
Denn ich bekommen im log immer wieder die Fehlermeldung
exception: Failed to open mixer for 'My ALSA Device': no such mixer control: PCM
Details der einzelnen Dateien – siehe unten.
Mein setup:
Raspberry pi 4B 4GB
pi@raspberrypi:~ $ cat /etc/os-release
PRETTY_NAME="Raspbian GNU/Linux 10 (buster)" NAME="Raspbian GNU/Linux" VERSION_ID="10" VERSION="10 (buster)"
uname -r
5.4.72-v7l+
head -1 /etc/rpi-issue
Raspberry Pi reference 2020-08-20
NetzteiL: :“5V 3A USB-C Netzteil für Raspberry Pi4 Model B“ von Miuzei
Es wäre super, wenn mir jemand helfen würde!
Ich bitte um Entschuldigung falls ich mit meiner Frage etwas falsch gemacht haben sollte.
Danke
Josef
unten nun einige relevante Daten und files
(ich hoffe das ist nicht zu viel Info - aber ich habe versucht mich an die Vorgaben im Forum zu halten)
Verlauf der Installation entsprechend tutorial :
pi@raspberrypi:~ $ sudo apt-get update
OK:1 http://archive.raspberrypi.org/debian buster InRelease
Holen:2 http://raspbian.raspberrypi.org/raspbian buster InRelease [15,0 kB]
Holen:3 http://raspbian.raspberrypi.org/raspbian buster/main armhf Packages [13,0 MB]
Es wurden 13,0 MB in 11 s geholt (1.186 kB/s).
Paketlisten werden gelesen... Fertig
pi@raspberrypi:~ $ sudo apt-get install mpd mpc alsa-utils
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.
Statusinformationen werden eingelesen.... Fertig
alsa-utils ist schon die neueste Version (1.1.8-2).
mpd ist schon die neueste Version (0.21.5-3).
Die folgenden NEUEN Pakete werden installiert:
mpc
0 aktualisiert, 1 neu installiert, 0 zu entfernen und 1 nicht aktualisiert.
Es müssen 34,4 kB an Archiven heruntergeladen werden.
Nach dieser Operation werden 87,0 kB Plattenplatz zusätzlich benutzt.
Möchten Sie fortfahren? [J/n] j
Holen:1 http://debian.bio.lmu.de/raspbian/raspbian buster/main armhf mpc armhf 0.31-1 [34,4 kB]
Es wurden 34,4 kB in 1 s geholt (65,2 kB/s).
Vormals nicht ausgewähltes Paket mpc wird gewählt.
(Lese Datenbank ... 115137 Dateien und Verzeichnisse sind derzeit installiert.)
Vorbereitung zum Entpacken von .../archives/mpc_0.31-1_armhf.deb ...
Entpacken von mpc (0.31-1) ...
mpc (0.31-1) wird eingerichtet ...
Trigger für man-db (2.8.5-2) werden verarbeitet ...
pi@raspberrypi:~ $ sudo modprobe snd_bcm2835
pi@raspberrypi:~ $ sudo amixer cset numid=3 1
amixer: Cannot find the given element from control default
pi@raspberrypi:~ $ sudo nano /etc/mpd.conf
pi@raspberrypi:~ $ sudo nano /etc/modules
pi@raspberrypi:~ $ sudo chmod g+w /var/lib/mpd/music/ /var/lib/mpd/playlists/
pi@raspberrypi:~ $ sudo chgrp audio /var/lib/mpd/music/ /var/lib/mpd/playlists/
pi@raspberrypi:~ $ sudo /etc/init.d/mpd restart
[ ok ] Restarting mpd (via systemctl): mpd.service.
pi@raspberrypi:~ $ sudo mpc update
Updating DB (#1) ...
volume: n/a repeat: off random: off single: off consume: off
pi@raspberrypi:~ $
Display More
Logfile mpd.log hat folgenden Inhalt: (Auszug)
Dec 02 17:48 : zeroconf: No global port, disabling zeroconf
Dec 02 17:49 : client: [0] opened from local
Dec 02 17:49 : exception: Failed to read mixer for 'My ALSA Device': no such mixer control: PCM
Dec 02 17:49 : client: [0] closed
Dec 02 17:50 : client: [1] opened from 127.0.0.1:33342
Dec 02 17:50 : exception: Failed to open mixer for 'My ALSA Device': no such mixer control: PCM
Inhalt von mpd.conf
# An example configuration file for MPD.
# Read the user manual for documentation: http://www.musicpd.org/doc/user/
# or /usr/share/doc/mpd/html/user.html
# Files and directories #######################################################
#
# This setting controls the top directory which MPD will search to discover the
# available audio files and add them to the daemon's online database. This
# setting defaults to the XDG directory, otherwise the music directory will be
# be disabled and audio files will only be accepted over ipc socket (using
# file:// protocol) or streaming files over an accepted protocol.
#
music_directory "/var/lib/mpd/music"
#
# This setting sets the MPD internal playlist directory. The purpose of this
# directory is storage for playlists created by MPD. The server will use
# playlist files not created by the server but only if they are in the MPD
# format. This setting defaults to playlist saving being disabled.
#
playlist_directory "/var/lib/mpd/playlists"
#
# This setting sets the location of the MPD database. This file is used to
# load the database at server start up and store the database while the
# server is not up. This setting defaults to disabled which will allow
# MPD to accept files over ipc socket (using file:// protocol) or streaming
# files over an accepted protocol.
#
db_file "/var/lib/mpd/tag_cache"
#
# These settings are the locations for the daemon log files for the daemon.
# These logs are great for troubleshooting, depending on your log_level
# settings.
#
# The special value "syslog" makes MPD use the local syslog daemon. This
# setting defaults to logging to syslog, or to journal if mpd was started as
# a systemd service.
#
log_file "/var/log/mpd/mpd.log"
#
# This setting sets the location of the file which stores the process ID
# for use of mpd --kill and some init scripts. This setting is disabled by
# default and the pid file will not be stored.
#
pid_file "/run/mpd/pid"
#
# This setting sets the location of the file which contains information about
# most variables to get MPD back into the same general shape it was in before
# it was brought down. This setting is disabled by default and the server
# state will be reset on server start up.
#
state_file "/var/lib/mpd/state"
#
# The location of the sticker database. This is a database which
# manages dynamic information attached to songs.
#
sticker_file "/var/lib/mpd/sticker.sql"
#
###############################################################################
# General music daemon options ################################################
#
# This setting specifies the user that MPD will run as. MPD should never run as
# root and you may use this setting to make MPD change its user ID after
# initialization. This setting is disabled by default and MPD is run as the
# current user.
#
user "mpd"
#
# This setting specifies the group that MPD will run as. If not specified
# primary group of user specified with "user" setting will be used (if set).
# This is useful if MPD needs to be a member of group such as "audio" to
# have permission to use sound card.
#
#group "nogroup"
#
# This setting sets the address for the daemon to listen on. Careful attention
# should be paid if this is assigned to anything other then the default, any.
# This setting can deny access to control of the daemon. Choose any if you want
# to have mpd listen on every address. Not effective if systemd socket
# activation is in use.
#
# For network
#bind_to_address "localhost"
#
# And for Unix Socket
#bind_to_address "/run/mpd/socket"
#
# This setting is the TCP port that is desired for the daemon to get assigned
# to.
#
#port "6600"
#
# This setting controls the type of information which is logged. Available
# setting arguments are "default", "secure" or "verbose". The "verbose" setting
# argument is recommended for troubleshooting, though can quickly stretch
# available resources on limited hardware storage.
#
#log_level "default"
#
# Setting "restore_paused" to "yes" puts MPD into pause mode instead
# of starting playback after startup.
#
#restore_paused "no"
#
# This setting enables MPD to create playlists in a format usable by other
# music players.
#
#save_absolute_paths_in_playlists "no"
#
# This setting defines a list of tag types that will be extracted during the
# audio file discovery process. The complete list of possible values can be
# found in the user manual.
#metadata_to_use "artist,album,title,track,name,genre,date,composer,performer,disc"
#
# This example just enables the "comment" tag without disabling all
# the other supported tags:
#metadata_to_use "+comment"
#
# This setting enables automatic update of MPD's database when files in
# music_directory are changed.
#
#auto_update "yes"
#
# Limit the depth of the directories being watched, 0 means only watch
# the music directory itself. There is no limit by default.
#
#auto_update_depth "3"
#
###############################################################################
# Symbolic link behavior ######################################################
#
# If this setting is set to "yes", MPD will discover audio files by following
# symbolic links outside of the configured music_directory.
#
#follow_outside_symlinks "yes"
#
# If this setting is set to "yes", MPD will discover audio files by following
# symbolic links inside of the configured music_directory.
#
#follow_inside_symlinks "yes"
#
###############################################################################
# Zeroconf / Avahi Service Discovery ##########################################
#
# If this setting is set to "yes", service information will be published with
# Zeroconf / Avahi.
#
#zeroconf_enabled "yes"
#
# The argument to this setting will be the Zeroconf / Avahi unique name for
# this MPD server on the network. %h will be replaced with the hostname.
#
#zeroconf_name "Music Player @ %h"
#
###############################################################################
# Permissions #################################################################
#
# If this setting is set, MPD will require password authorization. The password
# setting can be specified multiple times for different password profiles.
#
#password "password@read,add,control,admin"
#
# This setting specifies the permissions a user has who has not yet logged in.
#
#default_permissions "read,add,control,admin"
#
###############################################################################
# Database #######################################################################
#
#database {
# plugin "proxy"
# host "other.mpd.host"
# port "6600"
#}
# Input #######################################################################
#
input {
plugin "curl"
# proxy "proxy.isp.com:8080"
# proxy_user "user"
# proxy_password "password"
}
# QOBUZ input plugin
input {
enabled "no"
plugin "qobuz"
# app_id "ID"
# app_secret "SECRET"
# username "USERNAME"
# password "PASSWORD"
# format_id "N"
}
# TIDAL input plugin
input {
enabled "no"
plugin "tidal"
# token "TOKEN"
# username "USERNAME"
# password "PASSWORD"
# audioquality "Q"
}
# Decoder #####################################################################
#
decoder {
plugin "hybrid_dsd"
enabled "no"
# gapless "no"
}
#
###############################################################################
# Audio Output ################################################################
#
# MPD supports various audio output types, as well as playing through multiple
# audio outputs at the same time, through multiple audio_output settings
# blocks. Setting this block is optional, though the server will only attempt
# autodetection for one sound card.
#
# An example of an ALSA output:
#
audio_output {
type "alsa"
name "My ALSA Device"
# die nächste Zeile "device" war auskommentiert
device "hw:0,0" # optional
# mixer_type "hardware" # optional
# mixer_device "default" # optional
# mixer_control "PCM" # optional
# mixer_index "0" # optional
}
#
# An example of an OSS output:
#
#audio_output {
# type "oss"
# name "My OSS Device"
# device "/dev/dsp" # optional
# mixer_type "hardware" # optional
# mixer_device "/dev/mixer" # optional
# mixer_control "PCM" # optional
#}
#
# An example of a shout output (for streaming to Icecast):
#
#audio_output {
# type "shout"
# encoder "vorbis" # optional
# name "My Shout Stream"
# host "localhost"
# port "8000"
# mount "/mpd.ogg"
# password "hackme"
# quality "5.0"
# bitrate "128"
# format "44100:16:1"
# protocol "icecast2" # optional
# user "source" # optional
# description "My Stream Description" # optional
# url "http://example.com" # optional
# genre "jazz" # optional
# public "no" # optional
# timeout "2" # optional
# mixer_type "software" # optional
#}
#
# An example of a recorder output:
#
#audio_output {
# type "recorder"
# name "My recorder"
# encoder "vorbis" # optional, vorbis or lame
# path "/var/lib/mpd/recorder/mpd.ogg"
## quality "5.0" # do not define if bitrate is defined
# bitrate "128" # do not define if quality is defined
# format "44100:16:1"
#}
#
# An example of a httpd output (built-in HTTP streaming server):
#
#audio_output {
# type "httpd"
# name "My HTTP Stream"
# encoder "vorbis" # optional, vorbis or lame
# port "8000"
# bind_to_address "0.0.0.0" # optional, IPv4 or IPv6
# quality "5.0" # do not define if bitrate is defined
# bitrate "128" # do not define if quality is defined
# format "44100:16:1"
# max_clients "0" # optional 0=no limit
#}
#
# An example of a pulseaudio output (streaming to a remote pulseaudio server)
# Please see README.Debian if you want mpd to play through the pulseaudio
# daemon started as part of your graphical desktop session!
#
#audio_output {
# type "pulse"
# name "My Pulse Output"
# server "remote_server" # optional
# sink "remote_server_sink" # optional
#}
#
# An example of a winmm output (Windows multimedia API).
#
#audio_output {
# type "winmm"
# name "My WinMM output"
# device "Digital Audio (S/PDIF) (High Definition Audio Device)" # optional
# or
# device "0" # optional
# mixer_type "hardware" # optional
#}
#
# An example of an openal output.
#
#audio_output {
# type "openal"
# name "My OpenAL output"
# device "Digital Audio (S/PDIF) (High Definition Audio Device)" # optional
#}
#
## Example "pipe" output:
#
#audio_output {
# type "pipe"
# name "my pipe"
# command "aplay -f cd 2>/dev/null"
## Or if you're want to use AudioCompress
# command "AudioCompress -m | aplay -f cd 2>/dev/null"
## Or to send raw PCM stream through PCM:
# command "nc example.org 8765"
# format "44100:16:2"
#}
#
## An example of a null output (for no audio output):
#
#audio_output {
# type "null"
# name "My Null Output"
# mixer_type "none" # optional
#}
#
###############################################################################
# Normalization automatic volume adjustments ##################################
#
# This setting specifies the type of ReplayGain to use. This setting can have
# the argument "off", "album", "track" or "auto". "auto" is a special mode that
# chooses between "track" and "album" depending on the current state of
# random playback. If random playback is enabled then "track" mode is used.
# See <http://www.replaygain.org> for more details about ReplayGain.
# This setting is off by default.
#
#replaygain "album"
#
# This setting sets the pre-amp used for files that have ReplayGain tags. By
# default this setting is disabled.
#
#replaygain_preamp "0"
#
# This setting sets the pre-amp used for files that do NOT have ReplayGain tags.
# By default this setting is disabled.
#
#replaygain_missing_preamp "0"
#
# This setting enables or disables ReplayGain limiting.
# MPD calculates actual amplification based on the ReplayGain tags
# and replaygain_preamp / replaygain_missing_preamp setting.
# If replaygain_limit is enabled MPD will never amplify audio signal
# above its original level. If replaygain_limit is disabled such amplification
# might occur. By default this setting is enabled.
#
#replaygain_limit "yes"
#
# This setting enables on-the-fly normalization volume adjustment. This will
# result in the volume of all playing audio to be adjusted so the output has
# equal "loudness". This setting is disabled by default.
#
#volume_normalization "no"
#
###############################################################################
# Character Encoding ##########################################################
#
# If file or directory names do not display correctly for your locale then you
# may need to modify this setting.
#
filesystem_charset "UTF-8"
#
###############################################################################
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