Run LedFX with audio

hey ho,
i would like to use LedFX on my truenas server. I have a usb Video Graber that i use for Hyperion. But i also want to use LedFX to use my led stripes with the music i hear on my tv.
But i have no idea how to manage to get the Audio from truenas in to the docker, alsa and pulsaudio dont run on the truenas.

Has anyone an idea how to make it work ?