[just Learning]

thanks to op/marcelveldt, kodi team, and others posting to this thread.

to give hope to others I have this kodi/addon working with the following :

odroid c2  w/32g micro-sd and usb sound dongle w/3.5mm out 
libreElec 8.2.5 w/ kodi 17.6
multimedia tools - 8.2.105; main menu,addons,install from repository,libreelec add-ons,program addons.
squeezebox 1.0.19; main menu,addons,install from repository,marcelveldt's beta repository,music add-ons.
... one needs to add marcelveldt's repo via post #1 before adding 'squeezebox' addon.
configure via, main menu,addons,my add-ons,music add-ons.
I selected my usb device.
rebooted kodi.

notes: I need to stop squeezelite via squeezebox before playing a movie/video I suspect as tolot noted in #133.
restart squeezebox once movie stops.

extra codos that lyrics works.
'picture slideshow screensaver' works while on the main kodi menu screen, even showing 'current playing' album cover and song name even via 'radio paradise' flac stream.
kodi/squeezebox syncs well with my other 3 rpi-squeezelites for whole house music and control ! nice.

nice I can have the 4k tv on, listening to music with artwork being displayed.

 update from my previous post.

I wanted to state what works for me as when reading long posts, I get confused if the addon works or not and what folks were using to get it to work.

squeezebox has been working great for me until I upgraded to:
LibreELEC (official): 9.0.1
that has
Kodi (18.1 Git:18.1-Leia)

and squeezebox stopped working.
it would play for a second or two and stop as others have reported.
it didn't matter if I started the lms/players via this kodi or my other dedicated squeeze players in the house, after 2 seconds or so all players in the house stopped.
my players are sync'd.
un-syncing this kodi squeezebox player allowed the other players to play normally/continuously, while this un-sync'd kodi/squeezebox player would still stop after the 2 seconds.

I did the change of commenting out the
'def onPlayBackStopped(self):'
suggested by
NewTomorrow on post #152
and it seems to be working normal again.
added benefit is that I don't need to stop squeezebox/lms playing when starting a movie via kodi, my music then resumes playing once the movie is stopped.
nice.

thanks NewTomorrow.