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#1 2021-01-08 23:38:08

magenfred
Member
Registered: 2021-01-08
Posts: 4

No sound with pulseaudio via HDMI

On my laptop with XFCE I have pulseaudio, pavucontrol, pulseaudio-alsa installed. I can successfully output audio via HDMI to my TV with any of the following:

aplay -D plug:hdmi /usr/share/sounds/alsa/Front_Center.wav
speaker-test --channels 2 --rate 44100 --device plug:hdmi
speaker-test --channels 2 --rate 48000 --device plug:hdmi

But if I select any of the HDMI outputs in pavucontrol I get no sound.

fuser -v /dev/snd/*

                     UTENTE      PID ACCESSO COMANDO
/dev/snd/controlC0:  stefano     855 F.... pulseaudio
/dev/snd/pcmC0D3p:   stefano     855 F...m pulseaudio

pacmd list-cards

1 card(s) available.
    index: 0
	name: <alsa_card.pci-0000_00_1f.3>
	driver: <module-alsa-card.c>
	owner module: 6
	properties:
		alsa.card = "0"
		alsa.card_name = "HDA Intel PCH"
		alsa.long_card_name = "HDA Intel PCH at 0x2ffb028000 irq 162"
		alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:1f.3"
		sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
		device.bus = "pci"
		device.vendor.id = "8086"
		device.vendor.name = "Intel Corporation"
		device.product.id = "9d71"
		device.product.name = "Sunrise Point-LP HD Audio"
		device.form_factor = "internal"
		device.string = "0"
		device.description = "Audio interno"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	profiles:
		input:analog-stereo: Ingresso «Stereo analogico» (priority 65, available: unknown)
		output:analog-stereo: Uscita «Stereo analogico» (priority 6500, available: unknown)
		output:analog-stereo+input:analog-stereo: Duplex stereo analogico (priority 6565, available: unknown)
		output:hdmi-stereo: Uscita «Digital Stereo (HDMI)» (priority 5900, available: unknown)
		output:hdmi-stereo+input:analog-stereo: Uscita «Digital Stereo (HDMI)» + Ingresso «Stereo analogico» (priority 5965, available: unknown)
		output:hdmi-surround: Uscita «Digital Surround 5.1 (HDMI)» (priority 800, available: unknown)
		output:hdmi-surround+input:analog-stereo: Uscita «Digital Surround 5.1 (HDMI)» + Ingresso «Stereo analogico» (priority 865, available: unknown)
		output:hdmi-surround71: Uscita «Digital Surround 7.1 (HDMI)» (priority 800, available: unknown)
		output:hdmi-surround71+input:analog-stereo: Uscita «Digital Surround 7.1 (HDMI)» + Ingresso «Stereo analogico» (priority 865, available: unknown)
		output:hdmi-stereo-extra1: Uscita «Digital Stereo (HDMI 2)» (priority 5700, available: no)
		output:hdmi-stereo-extra1+input:analog-stereo: Uscita «Digital Stereo (HDMI 2)» + Ingresso «Stereo analogico» (priority 5765, available: no)
		output:hdmi-surround-extra1: Uscita «Digital Surround 5.1 (HDMI 2)» (priority 600, available: no)
		output:hdmi-surround-extra1+input:analog-stereo: Uscita «Digital Surround 5.1 (HDMI 2)» + Ingresso «Stereo analogico» (priority 665, available: no)
		output:hdmi-surround71-extra1: Uscita «Digital Surround 7.1 (HDMI 2)» (priority 600, available: no)
		output:hdmi-surround71-extra1+input:analog-stereo: Uscita «Digital Surround 7.1 (HDMI 2)» + Ingresso «Stereo analogico» (priority 665, available: no)
		output:hdmi-stereo-extra2: Uscita «Digital Stereo (HDMI 3)» (priority 5700, available: no)
		output:hdmi-stereo-extra2+input:analog-stereo: Uscita «Digital Stereo (HDMI 3)» + Ingresso «Stereo analogico» (priority 5765, available: no)
		output:hdmi-surround-extra2: Uscita «Digital Surround 5.1 (HDMI 3)» (priority 600, available: no)
		output:hdmi-surround-extra2+input:analog-stereo: Uscita «Digital Surround 5.1 (HDMI 3)» + Ingresso «Stereo analogico» (priority 665, available: no)
		output:hdmi-surround71-extra2: Uscita «Digital Surround 7.1 (HDMI 3)» (priority 600, available: no)
		output:hdmi-surround71-extra2+input:analog-stereo: Uscita «Digital Surround 7.1 (HDMI 3)» + Ingresso «Stereo analogico» (priority 665, available: no)
		output:hdmi-stereo-extra3: Uscita «Digital Stereo (HDMI 4)» (priority 5700, available: no)
		output:hdmi-stereo-extra3+input:analog-stereo: Uscita «Digital Stereo (HDMI 4)» + Ingresso «Stereo analogico» (priority 5765, available: no)
		output:hdmi-surround-extra3: Uscita «Digital Surround 5.1 (HDMI 4)» (priority 600, available: no)
		output:hdmi-surround-extra3+input:analog-stereo: Uscita «Digital Surround 5.1 (HDMI 4)» + Ingresso «Stereo analogico» (priority 665, available: no)
		output:hdmi-surround71-extra3: Uscita «Digital Surround 7.1 (HDMI 4)» (priority 600, available: no)
		output:hdmi-surround71-extra3+input:analog-stereo: Uscita «Digital Surround 7.1 (HDMI 4)» + Ingresso «Stereo analogico» (priority 665, available: no)
		output:hdmi-stereo-extra4: Uscita «Digital Stereo (HDMI 5)» (priority 5700, available: no)
		output:hdmi-stereo-extra4+input:analog-stereo: Uscita «Digital Stereo (HDMI 5)» + Ingresso «Stereo analogico» (priority 5765, available: no)
		output:hdmi-surround-extra4: Uscita «Digital Surround 5.1 (HDMI 5)» (priority 600, available: no)
		output:hdmi-surround-extra4+input:analog-stereo: Uscita «Digital Surround 5.1 (HDMI 5)» + Ingresso «Stereo analogico» (priority 665, available: no)
		output:hdmi-surround71-extra4: Uscita «Digital Surround 7.1 (HDMI 5)» (priority 600, available: no)
		output:hdmi-surround71-extra4+input:analog-stereo: Uscita «Digital Surround 7.1 (HDMI 5)» + Ingresso «Stereo analogico» (priority 665, available: no)
		off: Spento (priority 0, available: unknown)
	active profile: <output:hdmi-stereo>
	sinks:
		alsa_output.pci-0000_00_1f.3.hdmi-stereo/#8: Audio interno Digital Stereo (HDMI)
	sources:
		alsa_output.pci-0000_00_1f.3.hdmi-stereo.monitor/#10: Monitor of Audio interno Digital Stereo (HDMI)
	ports:
		analog-input-internal-mic: Internal Microphone (priority 8900, latency offset 0 usec, available: unknown)
			properties:
				device.icon_name = "audio-input-microphone"
		analog-input-mic: Microphone (priority 8700, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "audio-input-microphone"
		analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
			properties:
				device.icon_name = "audio-speakers"
		analog-output-headphones: Headphones (priority 9900, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "audio-headphones"
		hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: yes)
			properties:
				device.icon_name = "video-display"
				device.product.name = "PHILIPS FTV"
		hdmi-output-1: HDMI / DisplayPort 2 (priority 5800, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "video-display"
		hdmi-output-2: HDMI / DisplayPort 3 (priority 5700, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "video-display"
		hdmi-output-3: HDMI / DisplayPort 4 (priority 5600, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "video-display"
		hdmi-output-4: HDMI / DisplayPort 5 (priority 5500, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "video-display"

pacmd list-sinks

1 sink(s) available.
  * index: 0
	name: <alsa_output.pci-0000_00_1f.3.hdmi-stereo>
	driver: <module-alsa-card.c>
	flags: HARDWARE DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
	state: SUSPENDED
	suspend cause: IDLE
	priority: 9030
	volume: front-left: 49150 /  75% / -7,50 dB,   front-right: 49150 /  75% / -7,50 dB
	        balance 0,00
	base volume: 65536 / 100% / 0,00 dB
	volume steps: 65537
	muted: no
	current latency: 0,00 ms
	max request: 0 KiB
	max rewind: 0 KiB
	monitor source: 0
	sample spec: s32le ch 2 48000 Hz
	channel map: front-left,front-right
	             Stereo
	used by: 0
	linked by: 1
	configured latency: 0,00 ms; range is 0,50 .. 1837,50 ms
	card: 0 <alsa_card.pci-0000_00_1f.3>
	module: 6
	properties:
		alsa.resolution_bits = "32"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = "HDMI 0"
		alsa.id = "HDMI 0"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "3"
		alsa.card = "0"
		alsa.card_name = "HDA Intel PCH"
		alsa.long_card_name = "HDA Intel PCH at 0x2ffb028000 irq 162"
		alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:1f.3"
		sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
		device.bus = "pci"
		device.vendor.id = "8086"
		device.vendor.name = "Intel Corporation"
		device.product.id = "9d71"
		device.product.name = "Sunrise Point-LP HD Audio"
		device.form_factor = "internal"
		device.string = "hdmi:0"
		device.buffering.buffer_size = "705600"
		device.buffering.fragment_size = "352800"
		device.access_mode = "mmap+timer"
		device.profile.name = "hdmi-stereo"
		device.profile.description = "Digital Stereo (HDMI)"
		device.description = "Audio interno Digital Stereo (HDMI)"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	ports:
		hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: yes)
			properties:
				device.icon_name = "video-display"
				device.product.name = "PHILIPS FTV"
	active port: <hdmi-output-0>

journalctl -b --user-unit=pulseaudio

-- Journal begins at Wed 2020-05-20 17:17:07 CEST, ends at Sat 2021-01-09 00:00:08 CET. --
gen 08 23:53:28 tkpd systemd[728]: Starting Sound Service...
gen 08 23:53:28 tkpd systemd[728]: Started Sound Service.
gen 08 23:53:29 tkpd pulseaudio[855]: Module "module-bluetooth-discover" should be loaded once at most. Refusing to load.
gen 09 00:00:06 tkpd systemd[728]: pulseaudio.service: Succeeded.
gen 09 00:00:06 tkpd systemd[728]: Starting Sound Service...
gen 09 00:00:07 tkpd systemd[728]: Started Sound Service.

Offline

#2 2021-01-09 00:13:28

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 11,851

Re: No sound with pulseaudio via HDMI

You don't have an active client on the HDMI card. What are you trying to play back how and where?

Offline

#3 2021-01-09 07:53:03

magenfred
Member
Registered: 2021-01-08
Posts: 4

Re: No sound with pulseaudio via HDMI

I tried to play sound from a bunch of applications (mpv, firefox, deadbeef...) through the TV speakers.

I noticed that if I unselect a HDMI profile in pavucontrol and use ALSA instead, adding ~/.asoundrc:

pcm.!default {
    type plug
    slave.pcm "hdmi"
}

as suggested in https://wiki.archlinux.org/index.php/Ad … oting#HDMI allowed me to playback to the TV speakers with mpv:

mpv --ao=alsa <file>

but it only works with flac and wav files and not mp3, mp4 or mkv.

Last edited by magenfred (2021-01-09 10:31:59)

Offline

#4 2021-01-09 09:42:13

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 11,851

Re: No sound with pulseaudio via HDMI

Post

sudo fuser -v /dev/snd/*
pacmd list-sinks
pacmd list-sink-inputs

during attempted playback. If the above was during attempted playback then you'd need to switch the application to the HDMI sink

Offline

#5 2021-01-09 10:42:54

magenfred
Member
Registered: 2021-01-08
Posts: 4

Re: No sound with pulseaudio via HDMI

sudo fuser -v /dev/snd/*             

Cannot stat file /proc/1024/fd/4: Permission denied
Cannot stat file /proc/1024/fd/5: Permission denied
Cannot stat file /proc/1024/fd/6: Permission denied
Cannot stat file /proc/1024/fd/25: Permission denied
Cannot stat file /proc/1024/fd/28: Permission denied
Cannot stat file /proc/1024/fd/29: Permission denied
Cannot stat file /proc/1024/fd/30: Permission denied
Cannot stat file /proc/1024/fd/31: Permission denied
Cannot stat file /proc/1024/fd/32: Permission denied
Cannot stat file /proc/1024/fd/33: Permission denied
Cannot stat file /proc/1024/fd/115: Permission denied
Cannot stat file /proc/1024/fd/119: Permission denied
Cannot stat file /proc/1024/fd/1023: Permission denied
Cannot stat file /proc/1133/fd/5: Permission denied
Cannot stat file /proc/1133/fd/6: Permission denied
Cannot stat file /proc/1133/fd/7: Permission denied
Cannot stat file /proc/1133/fd/8: Permission denied
Cannot stat file /proc/1133/fd/9: Permission denied
Cannot stat file /proc/1133/fd/10: Permission denied
Cannot stat file /proc/1133/fd/11: Permission denied
Cannot stat file /proc/1133/fd/12: Permission denied
Cannot stat file /proc/1133/fd/13: Permission denied
Cannot stat file /proc/1190/fd/3: Permission denied
Cannot stat file /proc/1218/fd/4: Permission denied
Cannot stat file /proc/1218/fd/5: Permission denied
Cannot stat file /proc/1218/fd/6: Permission denied
Cannot stat file /proc/1218/fd/25: Permission denied
Cannot stat file /proc/1218/fd/28: Permission denied
Cannot stat file /proc/1218/fd/29: Permission denied
Cannot stat file /proc/1218/fd/30: Permission denied
Cannot stat file /proc/1218/fd/31: Permission denied
Cannot stat file /proc/1218/fd/32: Permission denied
Cannot stat file /proc/1218/fd/33: Permission denied
Cannot stat file /proc/1218/fd/1023: Permission denied
Cannot stat file /proc/1232/fd/5: Permission denied
Cannot stat file /proc/1232/fd/6: Permission denied
Cannot stat file /proc/1232/fd/7: Permission denied
Cannot stat file /proc/1232/fd/8: Permission denied
Cannot stat file /proc/1232/fd/9: Permission denied
Cannot stat file /proc/1232/fd/10: Permission denied
Cannot stat file /proc/1232/fd/11: Permission denied
Cannot stat file /proc/1232/fd/12: Permission denied
Cannot stat file /proc/1232/fd/13: Permission denied
Cannot stat file /proc/1232/fd/17: Permission denied
Cannot stat file /proc/1232/fd/18: Permission denied
Cannot stat file /proc/1232/fd/38: Permission denied
Cannot stat file /proc/1249/fd/5: Permission denied
Cannot stat file /proc/1249/fd/6: Permission denied
Cannot stat file /proc/1249/fd/7: Permission denied
Cannot stat file /proc/1249/fd/8: Permission denied
Cannot stat file /proc/1249/fd/9: Permission denied
Cannot stat file /proc/1249/fd/10: Permission denied
Cannot stat file /proc/1249/fd/11: Permission denied
Cannot stat file /proc/1249/fd/12: Permission denied
Cannot stat file /proc/1249/fd/13: Permission denied
Cannot stat file /proc/1249/fd/17: Permission denied
Cannot stat file /proc/1249/fd/18: Permission denied
Cannot stat file /proc/1249/fd/38: Permission denied
                     USER        PID ACCESS COMMAND
/dev/snd/controlC0:  stefano     833 F.... pulseaudio
/dev/snd/pcmC0D3p:   stefano     833 F...m pulseaudio

pacmd list-sinks

1 sink(s) available.
  * index: 6
	name: <alsa_output.pci-0000_00_1f.3.hdmi-stereo>
	driver: <module-alsa-card.c>
	flags: HARDWARE DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
	state: RUNNING
	suspend cause: (none)
	priority: 9030
	volume: front-left: 49150 /  75% / -7,50 dB,   front-right: 49150 /  75% / -7,50 dB
	        balance 0,00
	base volume: 65536 / 100% / 0,00 dB
	volume steps: 65537
	muted: no
	current latency: 40,02 ms
	max request: 13 KiB
	max rewind: 13 KiB
	monitor source: 7
	sample spec: s32le ch 2 44100 Hz
	channel map: front-left,front-right
	             Stereo
	used by: 1
	linked by: 3
	configured latency: 40,00 ms; range is 0,50 .. 2000,00 ms
	card: 0 <alsa_card.pci-0000_00_1f.3>
	module: 6
	properties:
		alsa.resolution_bits = "32"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = "HDMI 0"
		alsa.id = "HDMI 0"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "3"
		alsa.card = "0"
		alsa.card_name = "HDA Intel PCH"
		alsa.long_card_name = "HDA Intel PCH at 0x2ffb028000 irq 162"
		alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:1f.3"
		sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
		device.bus = "pci"
		device.vendor.id = "8086"
		device.vendor.name = "Intel Corporation"
		device.product.id = "9d71"
		device.product.name = "Sunrise Point-LP HD Audio"
		device.form_factor = "internal"
		device.string = "hdmi:0"
		device.buffering.buffer_size = "705600"
		device.buffering.fragment_size = "352800"
		device.access_mode = "mmap+timer"
		device.profile.name = "hdmi-stereo"
		device.profile.description = "Digital Stereo (HDMI)"
		device.description = "Audio interno Digital Stereo (HDMI)"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	ports:
		hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: yes)
			properties:
				device.icon_name = "video-display"
				device.product.name = "PHILIPS FTV"
	active port: <hdmi-output-0>

pacmd list-sink-inputs

1 sink input(s) available.
    index: 2
	driver: <protocol-native.c>
	flags: START_CORKED 
	state: RUNNING
	sink: 6 <alsa_output.pci-0000_00_1f.3.hdmi-stereo>
	volume: front-left: 65536 / 100% / 0,00 dB,   front-right: 65536 / 100% / 0,00 dB
	        balance 0,00
	muted: no
	current latency: 71,75 ms
	requested latency: 60,00 ms
	sample spec: s16le ch 2 44100 Hz
	channel map: front-left,front-right
	             Stereo
	resample method: copy
	module: 12
	client: 11 <mpv Media Player>
	properties:
		media.icon_name = "mpv"
		media.name = "The Lover Of Beirut - mpv"
		application.name = "mpv Media Player"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "34"
		application.process.id = "1408"
		application.process.user = "stefano"
		application.process.host = "tkpd"
		application.process.binary = "mpv"
		application.language = "C"
		window.x11.display = ":0.0"
		application.process.machine_id = "dad00fc7d94049c0af362c95cb733cea"
		application.process.session_id = "1"
		application.icon_name = "mpv"
		module-stream-restore.id = "sink-input-by-application-name:mpv Media Player"

Offline

#6 2021-01-09 13:41:19

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 11,851

Re: No sound with pulseaudio via HDMI

That should be giving you the relevant output, unless pulse is accessing the wrong hdmi device, what's your

aplay -lL
amixer -c0

Offline

#7 2021-01-09 16:18:43

magenfred
Member
Registered: 2021-01-08
Posts: 4

Re: No sound with pulseaudio via HDMI

aplay -lL

null
    Discard all samples (playback) or generate zero samples (capture)
samplerate
    Rate Converter Plugin Using Samplerate Library
speexrate
    Rate Converter Plugin Using Speex Resampler
jack
    JACK Audio Connection Kit
oss
    Open Sound System
pulse
    PulseAudio Sound Server
speex
    Plugin using Speex DSP (resample, agc, denoise, echo, dereverb)
upmix
    Plugin for channel upmix (4,6,8)
vdownmix
    Plugin for channel downmix (stereo) with a simple spacialization
default
    Default ALSA Output (currently PulseAudio Sound Server)
sysdefault:CARD=PCH
    HDA Intel PCH, ALC285 Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC285 Analog
    Front output / input
surround21:CARD=PCH,DEV=0
    HDA Intel PCH, ALC285 Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, ALC285 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, ALC285 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, ALC285 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, ALC285 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, ALC285 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=PCH,DEV=0
    HDA Intel PCH, HDMI 0
    HDMI Audio Output
hdmi:CARD=PCH,DEV=1
    HDA Intel PCH, HDMI 1
    HDMI Audio Output
hdmi:CARD=PCH,DEV=2
    HDA Intel PCH, HDMI 2
    HDMI Audio Output
hdmi:CARD=PCH,DEV=3
    HDA Intel PCH, HDMI 3
    HDMI Audio Output
hdmi:CARD=PCH,DEV=4
    HDA Intel PCH, HDMI 4
    HDMI Audio Output
usbstream:CARD=PCH
    HDA Intel PCH
    USB Stream Output
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC285 Analog [ALC285 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

amixer -c0

Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 87
  Mono: Playback 85 [98%] [-1.50dB] [on]
Simple mixer control 'Headphone',0
  Capabilities: pswitch
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [off]
  Front Right: Playback [off]
Simple mixer control 'Speaker',0
  Capabilities: pswitch
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [on]
  Front Right: Playback [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 255 [100%] [0.00dB]
  Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'Line Out',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 87
  Mono:
  Front Left: Playback 87 [100%] [0.00dB]
  Front Right: Playback 87 [100%] [0.00dB]
Simple mixer control 'Mic Boost',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 0 [0%] [0.00dB]
  Front Right: 0 [0%] [0.00dB]
Simple mixer control 'Mic Mute-LED Mode',0
  Capabilities: enum
  Items: 'On' 'Off' 'Follow Capture' 'Follow Mute'
  Item0: 'Follow Mute'
Simple mixer control 'IEC958',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'IEC958',1
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'IEC958',2
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'IEC958',3
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'IEC958',4
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 63
  Front Left: Capture 39 [62%] [12.00dB] [on]
  Front Right: Capture 52 [83%] [21.75dB] [on]
Simple mixer control 'Auto-Mute Mode',0
  Capabilities: enum
  Items: 'Disabled' 'Enabled'
  Item0: 'Enabled'
Simple mixer control 'Internal Mic Boost',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 0 [0%] [0.00dB]
  Front Right: 0 [0%] [0.00dB]

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