x86 (gpt and legacy mbr) no output

Hello, as per the title, im trying to deploy balena sound on some generic x86 devices i have around, with the idea of setting up a multiroom system. Im using balena sound 3.9.6 available on balenahub

The deployment succeeded and if i try to output from spotify, i see the correct logs from the respective container, but no sound is produced from the 35mm jack.

Ive tried with both AUDIO_OUTPUT=HEADPHONES as well as leaving it on AUTO, same result, although the HEADPHONES value generates extra errors

2024-04-16T14:34:34+00:00  audio  E: [pulseaudio] module-loopback.c: No such sink.
2024-04-16T14:34:34+00:00  audio  E: [pulseaudio] module.c: Failed to load module "module-loopback" (argument: "latency_msec=200 source=balena-sound.output.monitor sink=HEADPHONES"): initialization failed.
2024-04-16T14:34:34+00:00  audio  E: [pulseaudio] main.c: Sink HEADPHONES does not exist.

From within the audio container, i get the following outputs:

bash-5.1# cat /proc/asound/cards
 0 [hda-intel      ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xd0700000 irq 95
bash-5.1# aplay --list-devices
**** List of PLAYBACK Hardware Devices ****
card 0: hda-intel [HDA Intel PCH], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: hda-intel [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: hda-intel [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
bash-5.1# aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
default:CARD=hda-intel
    HDA Intel PCH, ALC662 rev3 Analog
    Default Audio Device
sysdefault:CARD=hda-intel
    HDA Intel PCH, ALC662 rev3 Analog
    Default Audio Device
front:CARD=hda-intel,DEV=0
    HDA Intel PCH, ALC662 rev3 Analog
    Front output / input
surround21:CARD=hda-intel,DEV=0
    HDA Intel PCH, ALC662 rev3 Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=hda-intel,DEV=0
    HDA Intel PCH, ALC662 rev3 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=hda-intel,DEV=0
    HDA Intel PCH, ALC662 rev3 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=hda-intel,DEV=0
    HDA Intel PCH, ALC662 rev3 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=hda-intel,DEV=0
    HDA Intel PCH, ALC662 rev3 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=hda-intel,DEV=0
    HDA Intel PCH, ALC662 rev3 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=hda-intel,DEV=0
    HDA Intel PCH, HDMI 0
    HDMI Audio Output
hdmi:CARD=hda-intel,DEV=1
    HDA Intel PCH, HDMI 1
    HDMI Audio Output

Even when I try to generate a test sound, i get the following error.

bash-5.1# speaker-test -t wav -c 6

speaker-test 1.2.5.1

Playback device is default
Stream parameters are 48000Hz, S16_LE, 6 channels
WAV file(s)
ALSA lib pcm_dmix.c:1035:(snd_pcm_dmix_open) unable to open slave
Playback open error: -16,Resource busy

As im running out of ideas, a bit of support would be very appreciated