Using latest OSMC on RPi3. Whenever a sound is sent from KODI (for example if turning off the ‘always send white noise’ option - when a song starts, or when GUI sound is heard and until a minute after when the sound is turned off by default) - there is a constant hum, pretty significant - not something avoidable.
Again, the hum is only when the audio driver is active, not all the time, so not related to speakers/magnetics/wiring out of the RPi3.
playing with the KODI volume doesn’t change the humming volume, unless completely muted.
Any ideas?