MInt 13: volume control doesn't change volume

This article involves choosing a non-default sound device.

Description:

1.When Adobe flash player 11 played online music, it went too fast. As soon as a certain point was buffered, the player jumped to it; in other word, if at this time the player was playing at 1:20, and the media was buffered till 2:30, then the player skipped the music between 1:20 and 2:30, and jumped to the 2:30 point. (I hope I have made myself understood) This is similar for local music player Banshee, though it did not buffer the music.

2. When a music or a video was played, pressing volume up/down button on the keyboard or directly using the volume control on desktop did not change the volume at all. 

Solutions: 

I first suspected that the flash player was not working properly. However, while I was re-installing the plugin, I happened to download a music, and realize that it didn't work properly in my disk as well. Then I opened the control center, and realized the cause related to the sound device. I had two listed sound device, and the default choice was the HDMI one, as shown below. I chose the built-in one, and it worked sometimes, but after reboot, the device in work became the HDMI again.

Then this thread worked out.

And here's my output

 $ sudo cat /proc/asound/modules 

[sudo] password for ao: 

 0 snd_hda_intel

 1 snd_hda_intel

Yes, there were actually no difference between these two; I believe if you get this output as well, you may refer to the index of item in your Sound Preferences in Control Center, (i.e. the first= index=0)

Follow the instructions in the link, and hopefully it will work fine.