Pavucontrol shows that audio is playing but no output heard

Hi linuxquestions users i have a problem that has been bothering me for a week now:
I have installed debian 10 (buster)(32-bit) on an acer aspire 1610 and i am having problems with the audio card:
essentially pavucontrol tells me that sound is playing but no sound can be heard from the sink in question (my rear green jack)
The machine mounts a SIS966 audio card and an NVidia graphics card that has also audio card features (hdmi)
I couldn't care less about the NVidia card i just want the SIS card to be working
---System Information---
OS: Debian 10 buster
Desktop manager: LXDE
Code:pacmd list-sinks
2 sink(s) available.
index: 0
name: <alsa_output.pci-0000_01_00.1.hdmi-stereo-extra1>
driver: <module-alsa-card.c>
flags: HARDWARE DECIBEL_VOLUME LATENCY FLAT_VOLUME DYNAMIC_LATENCY
state: IDLE
suspend cause: (none)
priority: 9030
volume: front-left: 200 / 0% / -150.93 dB, front-right: 200 / 0% / -150.93 dB
balance 0.00
base volume: 65536 / 100% / 0.00 dB
volume steps: 65537
muted: yes
current latency: 30.57 ms
max request: 6 KiB
max rewind: 6 KiB
monitor source: 0
sample spec: s16le 2ch 44100Hz
channel map: front-left,front-right
Stereo
used by: 0
linked by: 1
configured latency: 40.00 ms; range is 0.50 .. 1999.82 ms
card: 0 <alsa_card.pci-0000_01_00.1>
module: 6
properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "HDMI 1"
alsa.id = "HDMI 1"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "7"
alsa.card = "1"
alsa.card_name = "HDA NVidia"
alsa.long_card_name = "HDA NVidia at 0xfcffc000 irq 17"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:01:00.1"
sysfs.path = "/devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1"
device.bus = "pci"
device.vendor.id = "10de"
device.vendor.name = "NVIDIA Corporation"
device.product.id = "0e0f"
device.product.name = "GK208 HDMI/DP Audio Controller"
device.string = "hdmi:1,1"
device.buffering.buffer_size = "352768"
device.buffering.fragment_size = "176384"
device.access_mode = "mmap+timer"
device.profile.name = "hdmi-stereo-extra1"
device.profile.description = "Digital Stereo (HDMI 2)"
device.description = "GK208 HDMI/DP Audio Controller Digital Stereo (HDMI 2)"
alsa.mixer_name = "Nvidia GPU 51 HDMI/DP"
alsa.components = "HDA:10de0051,145836f9,00100100"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
ports:
hdmi-output-1: HDMI / DisplayPort 2 (priority 5800, latency offset 0 usec, available: yes)
properties:
device.icon_name = "video-display"
device.product.name = "CVTE TV
"
active port: <hdmi-output-1>
* index: 3
name: <alsa_output.pci-0000_00_0f.0.analog-stereo>
driver: <module-alsa-card.c>
flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY FLAT_VOLUME DYNAMIC_LATENCY
state: RUNNING
suspend cause: (none)
priority: 9039
volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB
balance 0.00
base volume: 65536 / 100% / 0.00 dB
volume steps: 65537
muted: yes
current latency: 39.98 ms
max request: 7 KiB
max rewind: 7 KiB
monitor source: 4
sample spec: s16le 2ch 48000Hz
channel map: front-left,front-right
Stereo
used by: 1
linked by: 3
configured latency: 40.00 ms; range is 0.50 .. 1837.33 ms
card: 1 <alsa_card.pci-0000_00_0f.0>
module: 7
properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "ALC1200 Analog"
alsa.id = "ALC1200 Analog"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "HDA SIS966"
alsa.long_card_name = "HDA SIS966 at 0xfdff0000 irq 18"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:00:0f.0"
sysfs.path = "/devices/pci0000:00/0000:00:0f.0/sound/card0"
device.bus = "pci"
device.vendor.id = "1039"
device.vendor.name = "Silicon Integrated Systems [SiS]"
device.product.id = "7502"
device.product.name = "Azalia Audio Controller"
device.form_factor = "internal"
device.string = "front:0"
device.buffering.buffer_size = "352768"
device.buffering.fragment_size = "176384"
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 ALC1200"
alsa.components = "HDA:10ec0888,105b0c9e,00100101"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
ports:
analog-output-lineout: Line Out (priority 9900, latency offset 0 usec, available: no)
properties:

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>
Code: cat /proc/asound/cards
0 [SIS966 ]: HDA-Intel - HDA SIS966
HDA SIS966 at 0xfdff0000 irq 18
1 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xfcffc000 irq 17Code: uname -r 5.10.13things that i know and that i've tried

Things that i know:

• The user is in the audio group
  The behaviour is present even with sudo
  The tests that i've done where done with speaker-test and mpv (none working)

Things that i've tried:

• Unmuted anything unmutable in the alsamixer
  Changed default soundcard systemwide
  Updated kernel
  Uninstalled pulseaudio (and reinstalled afterwards)
  Tried same tests from various live cds (manjaro/linux mint/puppy linux fossapup)

Any guesses? thanks