Alsasink issue with PI and kmssink overlaying console text

[Daniel Rossi]

I am having a hard time getting audio working through the HDMI device in 
RP3. If I choose alsasink as the audiosink but no device, I get 
distorted audio through the HDMI. If I choose a full device selection, 
which wont work on RP4, I get an error about "This sound device does not 
have any controls.", and the audio playback is quiet

alsasink device=iec958:CARD=vc4hdmi,DEV=0

If I run as a system user with no home directory or password,it fails to 
see the device altogether.

Using kmssink to display to HDMI works, but it doesn't scale the whole 
way on a TV and therefore shows console text on the top and bottom.

Any ideas ?
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