Hi there! I need help with sound settings. I use Raspberry Pi3 + Volumio + USB audio card 5.1 (amazon.com/VAlinks-External … Bcard&th=1). The problem is that I can duplicate the sound on all 6 channels, but I can’t decompose them. I found on the wiki information about alsa-plugins (upmix plugin), but something I’m doing wrong. I want to get a normal full 5.1.
Here is the output of commands and configuration:
aplay -l
[spoiler]root@volumio:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
Subdevices: 7/7
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
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 5: Device [USB Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0[/spoiler]
aplay -L
[spoiler]root@volumio:~# aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
ch51
default:CARD=ALSA
bcm2835 ALSA, bcm2835 ALSA
Default Audio Device
sysdefault:CARD=ALSA
bcm2835 ALSA, bcm2835 ALSA
Default Audio Device
dmix:CARD=ALSA,DEV=0
bcm2835 ALSA, bcm2835 ALSA
Direct sample mixing device
dmix:CARD=ALSA,DEV=1
bcm2835 ALSA, bcm2835 IEC958/HDMI
Direct sample mixing device
dsnoop:CARD=ALSA,DEV=0
bcm2835 ALSA, bcm2835 ALSA
Direct sample snooping device
dsnoop:CARD=ALSA,DEV=1
bcm2835 ALSA, bcm2835 IEC958/HDMI
Direct sample snooping device
hw:CARD=ALSA,DEV=0
bcm2835 ALSA, bcm2835 ALSA
Direct hardware device without any conversions
hw:CARD=ALSA,DEV=1
bcm2835 ALSA, bcm2835 IEC958/HDMI
Direct hardware device without any conversions
plughw:CARD=ALSA,DEV=0
bcm2835 ALSA, bcm2835 ALSA
Hardware device with all software conversions
plughw:CARD=ALSA,DEV=1
bcm2835 ALSA, bcm2835 IEC958/HDMI
Hardware device with all software conversions
default:CARD=Device
USB Sound Device, USB Audio
Default Audio Device
sysdefault:CARD=Device
USB Sound Device, USB Audio
Default Audio Device
front:CARD=Device,DEV=0
USB Sound Device, USB Audio
Front speakers
surround21:CARD=Device,DEV=0
USB Sound Device, USB Audio
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=Device,DEV=0
USB Sound Device, USB Audio
4.0 Surround output to Front and Rear speakers
surround41:CARD=Device,DEV=0
USB Sound Device, USB Audio
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Device,DEV=0
USB Sound Device, USB Audio
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Device,DEV=0
USB Sound Device, USB Audio
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Device,DEV=0
USB Sound Device, USB Audio
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Device,DEV=0
USB Sound Device, USB Audio
IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=Device,DEV=0
USB Sound Device, USB Audio
Direct sample mixing device
dsnoop:CARD=Device,DEV=0
USB Sound Device, USB Audio
Direct sample snooping device
hw:CARD=Device,DEV=0
USB Sound Device, USB Audio
Direct hardware device without any conversions
plughw:CARD=Device,DEV=0
USB Sound Device, USB Audio
Hardware device with all software conversions[/spoiler]
asound.conf:[spoiler]pcm.ch51 {
slave sl2
type route
ttable.0.0 0.5
ttable.1.1 0.5
ttable.0.2 0.5
ttable.1.3 0.5
ttable.0.4 0.5
ttable.1.4 0.5
ttable.0.5 0.5
ttable.1.5 0.5
}
pcm_slave.sl2 {
channels 6
pcm “hw:5,0”
}[/spoiler]
mpd.conf:[spoiler]# Audio Output ################################################################
resampler {
plugin “soxr”
quality “high”
threads “1”
}
audio_output {
type “alsa”
name “MY_alsa”
channels “6”
device “ch51”
}
audio_output {
type “fifo”
enabled “no”
name “multiroom”
path “/tmp/snapfifo”
format “44100:16:2”
}
#replaygain “album”
#replaygain_preamp “0”
volume_normalization “no”
###############################################################################[/spoiler]
From the command aplay-L we can see that 5.1 surround sound is supported (highlighted in red).
In a network there are many similar questions but few useful answers.
Please help.