Sorry for the spam, but you have a very serious smoking gun in your log:
I like this type of (instructive) spam ;-)
D: [pulseaudio] alsa-util.c: Plug PCM: Direct Stream Mixing PCM
PulseAudio must not be running on top of dmix. dmix is the thing that,
by default, uses 48 kHz and does not support dynamic rate change.
You have something wrong in your .asoundrc or /etc/asound.conf. Please
delete both files.
I took the precaution of checking for alsa configuration files before report
the case, not personal configuration files were present (.asoundrc) and the
system wide config file was:
root@rpi:/tmp# ls -l /etc/asound*
-rw-r--r-- 1 root root 132 Feb 9 2013 /etc/asound.conf.disabled
but a bit more investigation:
root@rpi:/tmp# strace -f -e trace=file aplay -vv -d 1 -f cd -D front:0
/dev/zero 21 | grep ^open.*alsa | grep -v ENOENT
open(/usr/share/alsa/alsa.conf, O_RDONLY) = 3
open(/usr/share/alsa/alsa.conf.d/,
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = 3
open(/usr/share/alsa/alsa.conf.d//50-pulseaudio.conf, O_RDONLY) = 3
open(/usr/share/alsa/alsa.conf.d//pulse.conf, O_RDONLY) = 3
open(/usr/lib/arm-linux-gnueabihf/alsa-lib/libasound_module_conf_pulse.so,
O_RDONLY) = 3
open(/usr/share/alsa/cards/aliases.conf, O_RDONLY) = 3
open(/usr/share/alsa/pcm/default.conf, O_RDONLY) = 4
open(/usr/share/alsa/pcm/dmix.conf, O_RDONLY) = 4
open(/usr/share/alsa/pcm/dsnoop.conf, O_RDONLY) = 4
open(/usr/share/alsa/cards/USB-Audio.conf, O_RDONLY) = 3
open(/usr/share/alsa/pcm/front.conf, O_RDONLY) = 4
open(/usr/share/alsa/pcm/surround40.conf, O_RDONLY) = 4
open(/usr/share/alsa/pcm/surround41.conf, O_RDONLY) = 4
open(/usr/share/alsa/pcm/surround50.conf, O_RDONLY) = 4
open(/usr/share/alsa/pcm/surround51.conf, O_RDONLY) = 4
open(/usr/share/alsa/pcm/surround71.conf, O_RDONLY) = 4
open(/usr/share/alsa/pcm/iec958.conf, O_RDONLY) = 4
open(/usr/lib/arm-linux-gnueabihf/alsa-lib/libasound_module_rate_speexrate.so,
O_RDONLY) = 6
the file /usr/share/alsa/alsa.conf contains (among others plugins) dmix
settings, and it seems that is the common configuration on several distros that
I checked.
root@rpi:/tmp# grep dmix /usr/share/alsa/alsa.conf
defaults.pcm.dmix.max_periods 0
defaults.pcm.dmix.rate 48000
defaults.pcm.dmix.format unchanged
defaults.pcm.dmix.card defaults.pcm.card
defaults.pcm.dmix.device defaults.pcm.device
pcm.dmix cards.pcm.dmix
commenting out this lines results on the desired rate:
I: [pulseaudio] sink.c: Created sink 0 alsa_output.0.analog-stereo with
sample spec s16le 2ch 44100Hz and channel map front-left,front-right
well I suppose that the solution is comment this lines, but it seems a bit
dirty solution...
A big thanks to Alexander and the rest of the members who helped me to find
this.
P.D: just curiosity .. why PA triggers this plugin and mpd not??? (output:
opened plugin=alsa name=My ALSA device audio_format=44100:16:2)
/ect/mpd.conf
[...]
audio_output {
typealsa
nameMy ALSA device
device hw:0,0# optional
mixer_devicedefault # optional
mixer_control Master# optional
mixer_index 0 # optional
auto_resample no
auto_channels no
auto_format no
}
[...]
client: [38] opened from 10.20.30.10:38882
client: [38] process command play
playlist: play 0:2014/misc/song0003.mp3
decoder_thread: clearing mixramp tags
decoder_control: mixramp_start = NULL
decoder_control: mixramp_prev_end = NULL
decoder: audio_format=44100:24:2, seekable=true
client: [38] command returned 0
playlist: queue song 1:2014/misc/song0003.mp3
client: [38] process command list
client: command_process_list: process command status
client: command_process_list: command returned 0
client: command_process_list: process command currentsong
client: command_process_list: command returned 0
client: [38] process command list returned 0
client: [38] closed
alsa: buffer: size=90..262144 time=2040..5944309
alsa: period: size=45..131072 time=1020..2972155
alsa: default period_time = buffer_time/4 = 50/4 = 125000
alsa: buffer_size=22050 period_size=5513
output: opened plugin=alsa name=My ALSA device audio_format=44100:16:2
output: converting from 44100:24:2
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