16.04 on g4 mac mini, no sound

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[update]

I remove:
/etc/modprobe.d/blacklist.local.conf

now I view device:

but I dont hear any sound

p.s.
more info

ppc1.jpg766×534 33.4 KB

from: paman
http://digilander.libero.it/sacarde/np/ppc3.jpg

from: sudo alsamixer
http://digilander.libero.it/sacarde/np/ppc2.jpg