ALSA settings in my Arch Linux box http://tyru.hatenablog.com/entry/2015/02/22/161333

alsa-base.conf

# Set this to the correct number of cards.
options snd cards_limit=2

options snd-hda-intel id=PCH index=0
options snd-hda-intel id=HDMI index=1

asoundrc

# Use /etc/modprobe.d/alsa-base.conf to select a default(first) sound device.
# It also fixes a sound device number.
#pcm.!default {
#       type hw
#       card 1
#}
#
#ctl.!default {
#       type hw
#       card 1
#}

# Make sound device accessible by multiple applications.
pcm.dmixer {
    type dmix
    ipc_key 1024
    ipc_key_add_uid 0
    ipc_perm 0660
}
pcm.dsp {
    type plug
    slave.pcm "dmix"
}

hw.txt

$ LANG=C
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC887-VD Analog [ALC887-VD Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

$ cat /proc/asound/cards   
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf0610000 irq 27
 1 [HDMI           ]: HDA-Intel - HDA Intel HDMI
                      HDA Intel HDMI at 0xf0614000 irq 31

$ head -n1 /proc/asound/card*/codec*
==> /proc/asound/card0/codec#2 <==
Codec: Realtek ALC887-VD

==> /proc/asound/card1/codec#0 <==
Codec: Intel Haswell HDMI

$ lsmod | grep snd
snd_hda_codec_hdmi     49263  1 
snd_hda_codec_realtek    63196  1 
snd_hda_codec_generic    63087  1 snd_hda_codec_realtek
snd_hda_intel          26387  4 
snd_hda_controller     26938  1 snd_hda_intel
snd_hda_codec         112621  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep              17244  1 snd_hda_codec
snd_pcm                88785  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
snd_timer              26614  1 snd_pcm
snd                    73436  16 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
soundcore              13031  2 snd,snd_hda_codec

$ lspci | grep -i audio
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)