There are some software for us to virtual the 7.1 or 5.1 surround sound for headphones in Windows, such as Razer Surround, so I can watch movies with 7.1 surround sound.
Is there anything like this in Ubuntu?
Yes it depends on your hardware - if your machine is capable of highdefinition sound reproduction it is part of the sound driver.
Now select the wanted Surround output. Turn up the volume, and enjoy! Happy Ubunting ;-)