Hello All, new here
I’ve been playing with Volumio on RPi and x86. I’m very tight, so was trying to avoid buying a sound card and WiFi dongle. I patched together an Ion D2700 machine from an old project (I have a box of them!) - it had WiFi, but no SPDIF. The machines I had with SPDIF wouldn’t boot Volumio. So I just resigned myself to 3.5mm audio jack…
But I couldn’t stop scratching the itch, especially when I saw the HDMI option in the Volumio Audio Output options.
Based on this post…
ubuntuforums.org/showthread.php?t=1552250
…I managed to piece together the information. Fishing around in ‘/proc/asound’ I found a card that had an ‘eld’ that mentioned the SONY TV I was plugged into:
volumio@volumio:/proc/asound/card1$ cat ./eld#0.1
monitor_present 1
eld_valid 1
monitor_name SONY TV
connection_type HDMI
eld_version [0x2] CEA-861D or below
edid_version [0x3] CEA-861-B, C or D
manufacture_id 0xd94d
product_id 0xee01
port_id 0x0
support_hdcp 0
support_ai 1
audio_sync_delay 0
speakers [0x1] FL/FR
sad_count 2
sad0_coding_type [0x1] LPCM
sad0_channels 2
sad0_rates [0xe0] 32000 44100 48000
sad0_bits [0xe0000] 16 20 24
sad1_coding_type [0x2] AC-3
sad1_channels 6
sad1_rates [0xe0] 32000 44100 48000
sad1_max_bitrate 640000
‘aplay -L’ helped me deduce that it was card 1, device 7
volumio@volumio:/proc/asound/card1$ aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
softvolume
softvol
default:CARD=PCH
HDA Intel PCH, ALC662 rev3 Analog
Default Audio Device
sysdefault:CARD=PCH
HDA Intel PCH, ALC662 rev3 Analog
Default Audio Device
front:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
Front speakers
surround21:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
dmix:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
Direct sample mixing device
dsnoop:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
Direct sample snooping device
hw:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
Direct hardware device without any conversions
plughw:CARD=PCH,DEV=0
HDA Intel PCH, ALC662 rev3 Analog
Hardware device with all software conversions
hdmi:CARD=NVidia,DEV=0
HDA NVidia, HDMI 0
HDMI Audio Output
hdmi:CARD=NVidia,DEV=1
HDA NVidia, HDMI 1
HDMI Audio Output
hdmi:CARD=NVidia,DEV=2
HDA NVidia, HDMI 2
HDMI Audio Output
dmix:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Direct sample mixing device
dmix:CARD=NVidia,DEV=7
HDA NVidia, HDMI 1
Direct sample mixing device
dmix:CARD=NVidia,DEV=8
HDA NVidia, HDMI 2
Direct sample mixing device
dsnoop:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Direct sample snooping device
dsnoop:CARD=NVidia,DEV=7
HDA NVidia, HDMI 1
Direct sample snooping device
dsnoop:CARD=NVidia,DEV=8
HDA NVidia, HDMI 2
Direct sample snooping device
hw:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Direct hardware device without any conversions
hw:CARD=NVidia,DEV=7
HDA NVidia, HDMI 1
Direct hardware device without any conversions
hw:CARD=NVidia,DEV=8
HDA NVidia, HDMI 2
Direct hardware device without any conversions
plughw:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Hardware device with all software conversions
plughw:CARD=NVidia,DEV=7
HDA NVidia, HDMI 1
Hardware device with all software conversions
plughw:CARD=NVidia,DEV=8
HDA NVidia, HDMI 2
Hardware device with all software conversions
I tested with aplay, and it worked!
volumio@volumio:/proc/asound/card1$ aplay -Dplughw:1,7 /usr/share/sounds/alsa/Front_Center.wav
So I just stuck these values in ‘/etc/asound.conf’ - and I’m enjoying PCM audio going to my amplifier…
volumio@volumio:/proc/asound/card1$ cat /etc/asound.conf
pcm.softvolume {
type plug
slave.pcm "softvol"
}
pcm.softvol {
type softvol
slave {
pcm "plughw:1,7"
}
control {
name "SoftMaster"
card 0
device 0
}
max_dB 0.0
min_dB -50.0
resolution 100
}
Just wanted to document it somewhere in case it helped