Comment # 12 on bug 1185764 from Diego Ercolani

Ok I did it:
(/etc/modprobe.d/50-sound.conf)
options snd slots=snd-hda-intel,snd-hda-intel
# Dt9q.ul4ScaGyp28:Family 17h (Models 00h-0fh) HD Audio Controller
alias snd-card-0 snd-hda-intel
# 7Wns.h5n+K7jZ6H1:Turks HDMI Audio [Radeon HD 6500/6600 / 6700M Series]
alias snd-card-1 snd-hda-intel

# disabilita HDMI
options snd-hda-intel enable=0,1
~                                                                               
but my question is:
- the analogic audio works without latency even with HDMI enabled
- with hdmi disabled I cannot ear (obviously) nothing via HDMI