Whats this Cable O.o?

[Hatashi]

Well, I had a good monitor, And it failed, So i bought a new one, Now i notice the old monitor had this cable plugged in it. The one side was plugged in the monitor and the other one in the PC. Does anyone know what these do?
Cause the new monitor doesnt have a hole to plug it in, And i also noticed that i can only hear sound with my earphones or speakers, So i guess it has something to do with sound :S

Heres a picture of it

[TheWiseGuy]

thats a sound cable...your old monitor had built in speakers im assuming

[Hatashi]

Ok thnx =l

So now i cant play sound without speakers -,-... Awsome..

[Raiyne]

Ok thnx =l

So now i cant play sound without speakers -,-... Awsome..

You're pretty sharp.

[Hatashi]

You're pretty sharp.

Ehm, Wha? If this is sarcasm i cant rlly understand it