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DAC ADC+

Hi folks, Complety new to Raspberry pi's! I have a possible issue bugging me, I'll start with hardware/software info

Raspberry Pi3 Model B 1Gb,

debian_version 11.3
os-release Raspbian GNU/Linux 11 (bullseye)"bianBugs"

Installed the card as described, did the following

remed dtparam=audio=on from /boot/config.txt
I changed dtoverlay=vc4-fkms-v3d to dtoverlay=vc4-fkms-v3d,audio=off 
dtoverlay=hifiberry-dacplusadc

I have also configured ALSA

SO when I click aplay -l, I get the following...

**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplusadc], device 0: HiFiBerry DAC+ADC HiFi multicodec-0 [HiFiBerry DAC+ADC HiFi multicodec-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

What confuses me is that the cards LED comes on for a minute whilst booting the pi, but then extinguishes before loading the main screen... I have not tried playing music or similar yet, nor recording, but the LED thing is bothering me as I understand it, the LED should be illuminated when in standby/idle?

Thanks


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