[Solved] rasp b+ hifiberry dac+ nohardware volume control

Help and Support Help
1

Hi
first of all thank you for this beautiful piece of software.
Unfortunately i have a problem which i can’t solve on my own.
Since I updated to Volumio 1.55 (raspberry b+ hifiberry dac+) the hardware mixer can’t be controlled from the UI. Volume control does not react.
It allways jumps back to 100.

aplay -l returns

root@volumio:~# aplay -l **** List of PLAYBACK Hardware Devices **** card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ HiFi pcm512x-hifi-0 [] Subdevices: 0/1 Subdevice #0: subdevice #0 card 1: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA] Subdevices: 8/8 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 Subdevice #2: subdevice #2 Subdevice #3: subdevice #3 Subdevice #4: subdevice #4 Subdevice #5: subdevice #5 Subdevice #6: subdevice #6 Subdevice #7: subdevice #7 card 1: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI] Subdevices: 1/1 Subdevice #0: subdevice #0

so it seems that Volumio recognizes the dac+

mpd.conf looks like this

[code]###################################

Auto generated mpd.conf file

please DO NOT edit it manually!

Use player-UI MPD config section

###################################

follow_outside_symlinks “yes”
follow_inside_symlinks “yes”
db_file “/var/lib/mpd/tag_cache”
sticker_file “/var/lib/mpd/sticker.sql”
log_file “/var/log/mpd/mpd.log”
pid_file “/var/run/mpd/pid”
music_directory “/var/lib/mpd/music”
playlist_directory “/var/lib/mpd/playlists”
state_file “/var/lib/mpd/state”
user “mpd”
bind_to_address “any”
port “6600”
zeroconf_enabled “yes”
zeroconf_name “volumio”
samplerate_converter “Fastest Sinc Interpolator”
volume_normalization “yes”
audio_buffer_size “2048”
buffer_before_play “20%”
filesystem_charset “UTF-8”
id3v1_encoding “UTF-8”
gapless_mp3_playback “yes”
auto_update “yes”
group “audio”
max_connections “20”

decoder {
plugin “ffmpeg”
enabled “yes”
}

input {
plugin “curl”
}

audio_output {

             type           "alsa"
             name           "Output"
             device         "hw:0,0"
             mixer_control  "Playback Digital"
             mixer_device   "hw:0"
             mixer_index    "0"
             dop    "no"

}[/code]

It seems to be a correct configuration, but volume does not work :cry:

Does anyone have similar prolems???
Do I miss something??? I am not a Unix expert but I tried to figure it out myself, but can’t find a solution therefore any help is apreceated.

Greetings from Germany
Peer

2

Hi…
please check your /boot/config.txt file. Volumio 1.55 now uses device tree overlay support for your HiFiBerry Dac+. There should be a line in /boot/config.txt

dtoverlay=hifiberry-dacplus

now go to /etc/mpd.conf and change the mixer control to:

mixer_control   "PCM"

Does this help?

3

Hello tracer5

I have exactly the same problem. I added dtoverlay=hifiberry-dacplus to /boot/config.txt (the line was missing).

I also changed mixer_control "PCM" in /etc/mpd.conf and restarted MPD.

But this does not change anything, I still can not control the volume via the hardware. Do you have any other idea ?

4

The weird thing is that amixer does not give any result, but aplay detects my hifiberry

# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dac], device 0: HifiBerry DAC HiFi pcm5102a-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
# amixer
#
5

Hi…
Do you have the Hifiberry DAC or the DAC+?
Your aplay -l output shows the DAC, not the DAC+. The aplay -l output for the DAC+ is

aplay -l The hifiberry dacplus is the only installed soundcard (normally card 0):

**** List of PLAYBACK Hardware Devices **** card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ HiFi pcm512x-hifi-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0

It is possible that the in /boot/config.txt file there is a second

line causing the wrong driver to be used. Please check.

6

Hi tracer5,
this worked for me. Thank you very much!!!
The /boot/config.txt allready had the dtoverlay set correctly, but mixer was on “Player Digital”.
I changed accordingly rebooted and all is fine now.
Thanks again.
Peer

7

Hello tracer5,

You’re absolutely right I have the DAC, not the DAC+. Silly I am ^^ Can the volume of the DAC be controlled by the hardware ?

I tried to set dtoverlay=hifiberry-dac in /boot/config.txt and rebooted, but it still does not work.

8

Hi…
The HiFiBerry DAC uses the PCM5102A chip, so does not have hardware volume control. You need to use software volume control.

The HiFiBerry DAC+ uses the PCM5122 chip and does have hardware volume control.

9

Hello,
I have the DAC (not the DAC +) and I didn’t find the way to manage volume under Volumio when I listen music from a NAS. You write that is not possible because this modul haven-t the good process but with Airplay I can control it.
So I don’t understand where is my problem.
My Volumio version is 1.5
My config.txt :
dtoverlay=hifiberry-dac

In my /etc/mpd.conf
audio_output {

             type           "alsa"
             name           "Output"
             device         "hw:0,0"
             mixer_control  "PCM"
             mixer_device   "hw:0"
             mixer_index    "0"
             dop    "no"

}
In the system interface, only Hifyberry works (no Hifyberry +)
Any idea ?
Thx
Nicolas