Check this:
https://wiki.ubuntu.com/PulseAudio#ALSA_Configuration

2012/5/1 Hans Georg Schaathun <[email protected]>:
> On Tue, 1 May 2012 11:03:27 +0200, Zsolt Udvari
>  <[email protected]> wrote:
> :  What soundsystem do you use? Maybe it can be pulse/jack problem.
> :  What is the sound output plugin of your programs?
>
> Sorry, I am not familiar with the jargon, so I am not quite sure
> what you are asking about.  I have done no more than installing
> ubuntu packages until it worked under xfce.
>
> But since
> % sudo aplay file
> gives sound; and
> % aplay file
> does not, it must be a pure privilege issue.
>
> All I know about the system is this:
> % sudo aplay -l
> [sudo] password for georg:
> **** List of PLAYBACK Hardware Devices ****
> Home directory /home/georg not ours.
> card 0: Intel [HDA Intel], device 0: ALC892 Analog [ALC892 Analog]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
> card 0: Intel [HDA Intel], device 1: ALC892 Digital [ALC892 Digital]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
> card 0: Intel [HDA Intel], device 3: HDMI 0 [HDMI 0]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
>
>
>
>
> --
> :-- Hans Georg
>
>
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