Hi Niels
See attached my current config.txt file... I have commented out the wm8731 line as I don't yet have the codec.
If I run a YouTube video I have sound via the headphone jack, so to my mind I have a sound driver installed and running?
Thanks for the clues, I must be getting close now?
Kevin - M0KHZ
# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details
?
# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1
?
# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1
?
# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16
?
# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720
?
# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1
?
# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1
?
# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2
?
# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4
?
# uncomment for composite PAL
#sdtv_mode=2
?
#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800
?
# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on
?
# Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18
?
# Additional overlays and parameters are documented /boot/overlays/README
?
# Enable audio (loads snd_bcm2835)
#dtparam=audio=on
?
[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
dtoverlay=vc4-fkms-v3d
max_framebuffers=2
?
[all]
#dtoverlay=vc4-fkms-v3d
?
gpio=4,17,27,22,10,9,11,5,6,13,26,16,12,7,8,25,24=ip,pu
gpio=24,23=op,pu
?
?
#Disable under-voltage warning
avoid_warnings=1
?
?
# Enable audio (loads snd_bcm2835)
dtparam=audio=on
#dtoverlay=audioinjector-wm8731-audio
