I have asked this question on raspberry pi forum but no response.
I am trying to make a web radio alarm with display and control using a sense hat. I got the radio working first on an old RPi A using mpc and the 3.5mm jack. When I added the sense hat the sound was dire so I got an HDMI to VGA with audio adapter and used PiZero. However the sound is still dire. Is there any way to get good sound from a PiZero with sense hat attached?
EDIT - following the advice below I scrapped the HDMI audio output and bought a pHAT DAC from pimoroni. This works really well and I would advise everyone to do something similar.