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No sound after tinkering with drivers
Posted: Wed Mar 25, 2020 5:55 am
by blizzard384
Hello, I was trying to get my jack output to work and while tinkering with it also my USB headphones stopped working after restarting. No I want atleast my USB audio to work. Here are some diagnostic commands:
Code: Select all
$ inxi -Fxz
System: Host: berger-personal-notebook Kernel: 5.3.0-42-generic x86_64 bits: 64 compiler: gcc v: 7.4.0
Desktop: Cinnamon 4.4.8 Distro: Linux Mint 19.3 Tricia base: Ubuntu 18.04 bionic
Machine: Type: Laptop System: Micro-Star product: GE75 Raider 9SF v: REV:1.0 serial: <filter>
Mobo: Micro-Star model: MS-17E2 v: REV:1.0 serial: <filter> UEFI: American Megatrends v: E17E2IMS.112
date: 06/14/2019
Battery: ID-1: BAT1 charge: 29.8 Wh condition: 49.6/53.4 Wh (93%) model: MSI BIF0_9 status: Unknown
CPU: Topology: 6-Core model: Intel Core i7-9750H bits: 64 type: MT MCP arch: Kaby Lake rev: A L2 cache: 12.0 MiB
flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 62399
Speed: 800 MHz min/max: 800/4500 MHz Core speeds (MHz): 1: 800 2: 800 3: 801 4: 800 5: 800 6: 800 7: 800 8: 800
9: 800 10: 800 11: 800 12: 800
Graphics: Device-1: Intel vendor: Micro-Star MSI driver: i915 v: kernel bus ID: 00:02.0
Device-2: NVIDIA vendor: Micro-Star MSI driver: N/A bus ID: 01:00.0
Display: x11 server: X.Org 1.20.5 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~144Hz
OpenGL: renderer: Mesa DRI Intel UHD Graphics 630 (Coffeelake 3x8 GT2) v: 4.5 Mesa 19.2.8 direct render: Yes
Audio: Device-1: Intel Cannon Lake PCH cAVS vendor: Micro-Star MSI driver: N/A bus ID: 00:1f.3
Device-2: NVIDIA vendor: Micro-Star MSI driver: N/A bus ID: 01:00.1
Network: Device-1: Intel Wireless-AC 9560 [Jefferson Peak] vendor: Bigfoot Networks driver: iwlwifi v: kernel port: 5000
bus ID: 00:14.3
IF: wlo1 state: down mac: <filter>
Device-2: Qualcomm Atheros Killer E2500 Gigabit Ethernet vendor: Micro-Star MSI driver: alx v: kernel port: 3000
bus ID: 03:00.0
IF: enp3s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
IF-ID-1: br-9e2341ebd631 state: up speed: N/A duplex: N/A mac: <filter>
IF-ID-2: docker0 state: down mac: <filter>
IF-ID-3: enp0s20f0u2c4i2 state: down mac: <filter>
IF-ID-4: veth9dc69c2 state: up speed: 10000 Mbps duplex: full mac: <filter>
Drives: Local Storage: total: 4.10 TiB used: 39.03 GiB (0.9%)
ID-1: /dev/nvme0n1 vendor: Western Digital model: PC SN520 SDAPNUW-512G-1032 size: 476.94 GiB
ID-2: /dev/sda vendor: Samsung model: SSD 860 QVO 4TB size: 3.64 TiB
Partition: ID-1: / size: 91.19 GiB used: 19.50 GiB (21.4%) fs: ext4 dev: /dev/nvme0n1p5
ID-2: swap-1 size: 2.00 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/dm-0
Sensors: System Temperatures: cpu: 50.0 C mobo: N/A
Fan Speeds (RPM): N/A
Info: Processes: 335 Uptime: 18m Memory: 31.21 GiB used: 4.12 GiB (13.2%) Init: systemd runlevel: 5 Compilers: gcc: 7.5.0
Code: Select all
$ aplay -l
aplay: device_list:270: no soundcards found...
Code: Select all
$ pacmd list-sinks
1 sink(s) available.
* index: 0
name: <auto_null>
driver: <module-null-sink.c>
flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 1000
volume: front-left: 46530 / 71% / -8,92 dB, front-right: 46530 / 71% / -8,92 dB
balance 0,00
base volume: 65536 / 100% / 0,00 dB
volume steps: 65537
muted: no
current latency: 0,00 ms
max request: 344 KiB
max rewind: 344 KiB
monitor source: 0
sample spec: s16le 2ch 44100Hz
channel map: front-left,front-right
Stereo
used by: 0
linked by: 0
configured latency: 0,00 ms; range is 0,50 .. 2000,00 ms
module: 11
properties:
device.description = "Dummy Output"
device.class = "abstract"
device.icon_name = "audio-card"
Can anyone help pleasae? I want to get my USB headphones to work again atleast. Audio jack output would be bonus.
Re: No sound after tinkering with drivers
Posted: Wed Mar 25, 2020 11:46 am
by MrEen
Hi blizzard384, and welcome to the forum.
We're probably going to need some clue as to what you've changed. Some hints:
1. Did you modify something in /etc/modprobe.d
2. Did you modify something in /etc/pulse
3. Did you create a .asoundrc file or a .pulse folder
For your line out issue, run
dmseg | grep snd
in the terminal. If this line exists in the output:
Code: Select all
snd_hda_intel 0000:00:1f.3: Digital mics found on Skylake+ platform, aborting probe
Then you need to run this to get your built-in sound card detected with the new kernel:
Code: Select all
sudo tee /etc/modprobe.d/alsa-fix.conf <<<'options snd-hda-intel dmic_detect=0'
Re: No sound after tinkering with drivers
Posted: Thu Mar 26, 2020 6:10 am
by blizzard384
1. Did you modify something in /etc/modprobe.d
2. Did you modify something in /etc/pulse
3. Did you create a .asoundrc file or a .pulse folder
I know this is going to sound stupid but I simply don't know. I was trying a lot of stuff from random guides to make it work and then at some point restarted computer and sound stopped working. But I don't think that I modify or create any files.
doesn't return anything
Re: No sound after tinkering with drivers
Posted: Thu Mar 26, 2020 7:42 am
by MrEen
All right. Start a song or video then run this command and paste it's output:
Code: Select all
curl https://gitlab.freedesktop.org/pulseaudio/pulseaudio/raw/master/src/utils/pa-info?inline=false | bash | nc termbin.com 9999
Re: No sound after tinkering with drivers
Posted: Thu Mar 26, 2020 7:57 am
by blizzard384
Code: Select all
$ curl https://gitlab.freedesktop.org/pulseaudio/pulseaudio/raw/master/src/utils/pa-info?inline=false | bash | nc termbin.com 9999
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 2039 100 2039 0 0 2980 0 --:--:-- --:--:-- --:--:-- 2976
ls: cannot access '/dev/snd/*': No such file or directory
lsof: WARNING: can't stat() overlay file system /var/lib/docker/overlay2/aedb1a031131e64c5904ad032626799fb343e191ab23d675ad740478d1face6e/merged
Output information may be incomplete.
lsof: WARNING: can't stat() tmpfs file system /var/lib/docker/containers/495cc39c1a4023853c9bb50851a1affae650d925d6677d16efb2b0c0c0530409/mounts/shm
Output information may be incomplete.
lsof: WARNING: can't stat() nsfs file system /run/docker/netns/b76ac3ec3751
Output information may be incomplete.
lsof: status error on /dev/snd/*: No such file or directory
lsof 4.89
latest revision: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/
latest FAQ: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/FAQ
latest man page: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/lsof_man
usage: [-?abhKlnNoOPRtUvVX] [+|-c c] [+|-d s] [+D D] [+|-E] [+|-e s] [+|-f[gG]]
[-F [f]] [-g [s]] [-i [i]] [+|-L [l]] [+m [m]] [+|-M] [-o [o]] [-p s]
[+|-r [t]] [-s [p:s]] [-S [t]] [-T [t]] [-u s] [+|-w] [-x [fl]] [--] [names]
Use the ``-h'' option to get more help information.
ls: cannot access '/proc/asound/card[0-9]': No such file or directory
cat: /proc/asound/version: No such file or directory
grep: /proc/asound/cards: No such file or directory
cat: /proc/asound/cards: No such file or directory
cat: /proc/asound/modules: No such file or directory
ls: cannot access '/dev/snd/*': No such file or directory
grep: /proc/asound/cards: No such file or directory
/usr/sbin/alsactl: save_state:1595: No soundcards found...
cat: /tmp/alsa-info.UkpaOmYYfh/alsactl.tmp: No such file or directory
https://termbin.com/bpz6
Thanks!
Re: No sound after tinkering with drivers
Posted: Thu Mar 26, 2020 8:05 am
by MrEen
Okay, try these.
First, delete the files in /home/YourUserName/.config/pulse, then run this command followed with a reboot:
Code: Select all
apt install --reinstall alsa-base alsa-utils pulseaudio linux-sound-base libasound2
If there's still issues, see if this command produces any output and paste it here:
Re: No sound after tinkering with drivers
Posted: Thu Mar 26, 2020 8:15 am
by blizzard384
Thanks for lookint into it. Really appreciate it.
Still the same though:
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$ dmesg | grep snd
[ 5.098391] sof_pci_dev: Unknown symbol snd_sof_runtime_idle (err -2)
[ 5.098413] sof_pci_dev: Unknown symbol snd_sof_runtime_resume (err -2)
[ 5.098423] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_bxt_machines (err -2)
[ 5.098448] sof_pci_dev: Unknown symbol snd_soc_acpi_find_machine (err -2)
[ 5.098458] sof_pci_dev: Unknown symbol snd_sof_device_remove (err -2)
[ 5.098468] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_glk_machines (err -2)
[ 5.098479] sof_pci_dev: Unknown symbol snd_sof_runtime_suspend (err -2)
[ 5.098489] sof_pci_dev: Unknown symbol snd_sof_resume (err -2)
[ 5.098515] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_icl_machines (err -2)
[ 5.098535] sof_pci_dev: Unknown symbol snd_sof_device_probe (err -2)
[ 5.098546] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_cnl_machines (err -2)
[ 5.098556] sof_pci_dev: Unknown symbol snd_sof_suspend (err -2)
Re: No sound after tinkering with drivers
Posted: Thu Mar 26, 2020 3:35 pm
by MrEen
Okay, that helps partly. Run this then reboot:
Code: Select all
sudo tee /etc/modprobe.d/alsa-fix.conf <<<'options snd-hda-intel dmic_detect=0'
I'm hoping that's going to work, but there's a possibility there's still some weird issue.
And if still no worky, once more with
dmesg | grep snd
.
Re: No sound after tinkering with drivers
Posted: Fri Mar 27, 2020 3:53 am
by blizzard384
Still no luck:
Code: Select all
$ dmesg | grep snd
[ 5.097196] sof_pci_dev: Unknown symbol snd_sof_runtime_idle (err -2)
[ 5.097221] sof_pci_dev: Unknown symbol snd_sof_runtime_resume (err -2)
[ 5.097232] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_bxt_machines (err -2)
[ 5.097257] sof_pci_dev: Unknown symbol snd_soc_acpi_find_machine (err -2)
[ 5.097268] sof_pci_dev: Unknown symbol snd_sof_device_remove (err -2)
[ 5.097280] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_glk_machines (err -2)
[ 5.097292] sof_pci_dev: Unknown symbol snd_sof_runtime_suspend (err -2)
[ 5.097303] sof_pci_dev: Unknown symbol snd_sof_resume (err -2)
[ 5.097329] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_icl_machines (err -2)
[ 5.097352] sof_pci_dev: Unknown symbol snd_sof_device_probe (err -2)
[ 5.097365] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_cnl_machines (err -2)
[ 5.097376] sof_pci_dev: Unknown symbol snd_sof_suspend (err -2)
Re: No sound after tinkering with drivers
Posted: Fri Mar 27, 2020 8:14 am
by MrEen
Did you reboot after running that? That should have prevented the sof_pci_dev stuff from loading. I'm guessing something is stopping alsa so the sof_pci is gettting through.
Maybe we should try the kernel config path instead. remove the edit we did with
sudo rm /etc/modprobe.d/alsa-fix.conf
Then follow the steps in
this post.
Reboot when done. If that doesn't change anything I have another idea, but it's going to take some time to find the command and I have to head to work right now.
I'll check in later once I find what I'm looking for.
Re: No sound after tinkering with drivers
Posted: Fri Mar 27, 2020 8:20 am
by blizzard384
There is a change after the reboot:
Code: Select all
$ dmesg | grep snd
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.3.0-42-generic root=UUID=51438eae-f67d-4a90-9e97-0906a4ec0b05 ro quiet splash snd_hda_intel.dmic_detect=0 vt.handoff=1
[ 0.123161] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.3.0-42-generic root=UUID=51438eae-f67d-4a90-9e97-0906a4ec0b05 ro quiet splash snd_hda_intel.dmic_detect=0 vt.handoff=1
[ 5.090746] sof_pci_dev: Unknown symbol snd_sof_runtime_idle (err -2)
[ 5.090782] sof_pci_dev: Unknown symbol snd_sof_runtime_resume (err -2)
[ 5.090792] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_bxt_machines (err -2)
[ 5.090813] sof_pci_dev: Unknown symbol snd_soc_acpi_find_machine (err -2)
[ 5.090828] sof_pci_dev: Unknown symbol snd_sof_device_remove (err -2)
[ 5.090993] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_glk_machines (err -2)
[ 5.091003] sof_pci_dev: Unknown symbol snd_sof_runtime_suspend (err -2)
[ 5.091012] sof_pci_dev: Unknown symbol snd_sof_resume (err -2)
[ 5.091035] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_icl_machines (err -2)
[ 5.091054] sof_pci_dev: Unknown symbol snd_sof_device_probe (err -2)
[ 5.091065] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_cnl_machines (err -2)
[ 5.091138] sof_pci_dev: Unknown symbol snd_sof_suspend (err -2)
Re: No sound after tinkering with drivers
Posted: Fri Mar 27, 2020 2:46 pm
by MrEen
Not enough of a change I'm afraid.
Just got home and am looking for that other idea that I think you need.
Re: No sound after tinkering with drivers
Posted: Fri Mar 27, 2020 2:57 pm
by MrEen
Okay, I'm still having difficulty, but I realized this may fix this issue:
Delete the files in /home/YourUserName/.config/pulse then run pulseaudio -k
in the terminal. Based on a post I found, there's a decent chance that's all you need here.
Re: No sound after tinkering with drivers
Posted: Sat Mar 28, 2020 11:08 am
by blizzard384
Still the same even after reboot:
Code: Select all
$ dmesg | grep snd
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.3.0-42-generic root=UUID=51438eae-f67d-4a90-9e97-0906a4ec0b05 ro quiet splash snd_hda_intel.dmic_detect=0 vt.handoff=1
[ 0.123844] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.3.0-42-generic root=UUID=51438eae-f67d-4a90-9e97-0906a4ec0b05 ro quiet splash snd_hda_intel.dmic_detect=0 vt.handoff=1
[ 5.268889] sof_pci_dev: Unknown symbol snd_sof_runtime_idle (err -2)
[ 5.268928] sof_pci_dev: Unknown symbol snd_sof_runtime_resume (err -2)
[ 5.268945] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_bxt_machines (err -2)
[ 5.268980] sof_pci_dev: Unknown symbol snd_soc_acpi_find_machine (err -2)
[ 5.268996] sof_pci_dev: Unknown symbol snd_sof_device_remove (err -2)
[ 5.269011] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_glk_machines (err -2)
[ 5.269027] sof_pci_dev: Unknown symbol snd_sof_runtime_suspend (err -2)
[ 5.269044] sof_pci_dev: Unknown symbol snd_sof_resume (err -2)
[ 5.269081] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_icl_machines (err -2)
[ 5.269113] sof_pci_dev: Unknown symbol snd_sof_device_probe (err -2)
[ 5.269131] sof_pci_dev: Unknown symbol snd_soc_acpi_intel_cnl_machines (err -2)
[ 5.269147] sof_pci_dev: Unknown symbol snd_sof_suspend (err -2)
Re: No sound after tinkering with drivers
Posted: Sat Mar 28, 2020 12:31 pm
by MrEen
Wow, this is a stubborn SOB.
What does it show when you run sudo alsa force-reload
?
Re: No sound after tinkering with drivers
Posted: Mon Mar 30, 2020 4:02 am
by blizzard384
Code: Select all
$ sudo alsa force-reload
Unloading ALSA sound driver modules: (none loaded).
Loading ALSA sound driver modules: (none to reload).
Re: No sound after tinkering with drivers
Posted: Mon Mar 30, 2020 1:19 pm
by MrEen
Okay, try alsactl init
and paste any messages, then do pulseaudio --start
and paste any messages. If pulse says already running, run pulseaudio -k
so it'll restart and hopefully recognize that alsa is now running.
Re: No sound after tinkering with drivers
Posted: Fri Apr 03, 2020 3:54 am
by blizzard384
The USB audio and build in speakers are now working! Thanks you so much for your help.
The analog audio (3.5mm jack out) is still not working though. Do you know if it is possible to make it work please? On Windows when I connect the jack a pop up shows where I have to select if I want to use the the external speakers or build in. But nothing like that happens on Linux.
Re: No sound after tinkering with drivers
Posted: Fri Apr 03, 2020 7:29 am
by MrEen
There's a few possibilities for this. Let's start with pacmd list-sinks
now that sound is working. Run that twice, once with something plugged in and once without.
Re: No sound after tinkering with drivers
Posted: Mon Apr 06, 2020 4:08 am
by blizzard384
Thank you!
Without:
Code: Select all
$ pacmd list-sinks
1 sink(s) available.
* index: 1
name: <alsa_output.pci-0000_00_1f.3.analog-stereo>
driver: <module-alsa-card.c>
flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 9039
volume: front-left: 33423 / 51% / -17,55 dB, front-right: 33423 / 51% / -17,55 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: 2
sample spec: s16le 2ch 44100Hz
channel map: front-left,front-right
Stereo
used by: 0
linked by: 0
configured latency: 0,00 ms; range is 0,50 .. 371,52 ms
card: 2 <alsa_card.pci-0000_00_1f.3>
module: 9
properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "ALC1220 Analog"
alsa.id = "ALC1220 Analog"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "HDA Intel PCH"
alsa.long_card_name = "HDA Intel PCH at 0xa5410000 irq 144"
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 = "a348"
device.form_factor = "internal"
device.string = "front:0"
device.buffering.buffer_size = "65536"
device.buffering.fragment_size = "32768"
device.access_mode = "mmap+timer"
device.profile.name = "analog-stereo"
device.profile.description = "Analog Stereo"
device.description = "Built-in Audio Analog Stereo"
alsa.mixer_name = "Realtek ALC1220"
alsa.components = "HDA:10ec1220,14621272,00100101 HDA:8086280b,80860101,00100000"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
ports:
analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
properties:
device.icon_name = "audio-speakers"
analog-output-headphones: Headphones (priority 9000, latency offset 0 usec, available: no)
properties:
device.icon_name = "audio-headphones"
active port: <analog-output-speaker>
With:
Code: Select all
$ pacmd list-sinks
1 sink(s) available.
* index: 1
name: <alsa_output.pci-0000_00_1f.3.analog-stereo>
driver: <module-alsa-card.c>
flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 9039
volume: front-left: 30129 / 46% / -20,25 dB, front-right: 30129 / 46% / -20,25 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: 2
sample spec: s16le 2ch 44100Hz
channel map: front-left,front-right
Stereo
used by: 0
linked by: 0
configured latency: 0,00 ms; range is 0,50 .. 371,52 ms
card: 2 <alsa_card.pci-0000_00_1f.3>
module: 9
properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "ALC1220 Analog"
alsa.id = "ALC1220 Analog"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "HDA Intel PCH"
alsa.long_card_name = "HDA Intel PCH at 0xa5410000 irq 144"
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 = "a348"
device.form_factor = "internal"
device.string = "front:0"
device.buffering.buffer_size = "65536"
device.buffering.fragment_size = "32768"
device.access_mode = "mmap+timer"
device.profile.name = "analog-stereo"
device.profile.description = "Analog Stereo"
device.description = "Built-in Audio Analog Stereo"
alsa.mixer_name = "Realtek ALC1220"
alsa.components = "HDA:10ec1220,14621272,00100101 HDA:8086280b,80860101,00100000"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
ports:
analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: no)
properties:
device.icon_name = "audio-speakers"
analog-output-headphones: Headphones (priority 9000, latency offset 0 usec, available: yes)
properties:
device.icon_name = "audio-headphones"
active port: <analog-output-headphones>