# Lines to set in /boot/firmware/config.txt on the Pi (see RUNBOOK §4.3 and §8.5).
# These are EDITS to the existing file, not a drop-in — apply them by hand, then reboot.

# 1. Disable onboard + HDMI audio so the USB interface is the only sound card.
#    Change the existing `dtparam=audio=on` to:
dtparam=audio=off
#    And append `,noaudio` to the existing vc4 overlay line:
dtoverlay=vc4-kms-v3d,noaudio

# 2. Wired-only box: disable onboard Wi-Fi. Add ONLY after the wired Ethernet
#    cutover is confirmed working (RUNBOOK §8.5) — never disable Bluetooth here.
dtoverlay=disable-wifi