/boot/recalbox-user-config.txt

# Change to your needs

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

disable_overscan=0

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# Sound output. Set to 0 or comment for autodetect, 1 for DVI, 2 to force HDMI.
#hdmi_drive=2

#config_hdmi_boost=0

# uncomment for composite PAL
sdtv_mode=3

# uncomment for lirc-rpi
#dtoverlay=lirc-rpi

# uncomment if you have chinese TV display and display is garbled or slow
#hdmi_ignore_edid=0xa5000080

hdmi_ignore_hotplug=1
audio_pwm_mode=2