Do you have passthrough enabled? (That will stop amplification from working).
Does it work better with omxplayer disabled?
Hi,
I have not touched standard audio settings in KODI, passthrough is disabled of course.
As far as i know, on RPi1 OMX Player cannot be disabled. In my Video Settings both
items: Hardware Acceleration OMX/MMAL are turned on. ( same as in OSMC/OpenELEC ).
I'm not sure if this has anything to do with the sound.