Allo boss dac

Hi guys,
i m a new user, Antonio. It’s my first time here and i would like ask u how set my allo boss dac as audio output. I have seen others topic here but without solution.
I have gone on MYOSMC and i have chosen "dtoverlay=allo-boss-dac-pcm512x-audio-overlay " as ouput…but then?My config.txt now is this

gpu_mem_1024=256
hdmi_ignore_cec_init=1
disable_overscan=1
start_x=1
dtoverlay=lirc-rpi
disable_splash=1

NOOBS Auto-generated Settings:

hdmi_force_hotplug= 1
arm_freq=850
core_freq=375
gpu_mem_256=112
dtoverlay=allo-boss-dac-pcm512x-audio-overlay
sdtv_aspect=1
dtparam=gpio_in_pin=18
gpu_mem_512=144
dtparam=gpio_out_pin=17
dtparam=audio=off
dtoverlay=w1-gpio-pullup-overlay

Maybe i should go to change the output audio on system setting…but i see only ANALOGUE and HDMI!What is wrong?

Tnx for the help

Did you reboot yet?

Make sure your device is up to date. Support was only added in the update released this afternoon

Sam