No sound on ubuntu 16.04

[Ralf Mardorf]

>> On Sat, Mar 11, 2017 at 4:50 PM, Asif Iqbal <vadud3 at gmail.com> wrote:
>>> aplay shows 4 devices and alsamixer show 2 devices.
>>>
>>> $ sudo aplay -l
>>> **** List of PLAYBACK Hardware Devices ****
>>> card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
    ^^^^^^
>>>   Subdevices: 1/1
>>>   Subdevice #0: subdevice #0
>>> card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
    ^^^^^^
>>>   Subdevices: 1/1
>>>   Subdevice #0: subdevice #0
>>> card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
    ^^^^^^
>>>   Subdevices: 1/1
>>>   Subdevice #0: subdevice #0
>>> card 1: PCH [HDA Intel PCH], device 0: 92HD91BXX Analog [92HD91BXX
    ^^^^^^
>>> Analog] Subdevices: 1/1
>>>   Subdevice #0: subdevice #0

I can't help with those onboard devices, but I could explain at least a
misunderstanding.

The output of aplay doesn't show 4 devices, it also displays just two
devices, card 0 and card 1 = 2 devices.