Audio out?

[sebasjazz]

Hi, i have a und405500 Samsung tv, im very happy with it.
Here?s my question: I have two edifier speakers conected to the tv by audio analog out (3,5 mm jack to rca on the speakers). The audio is very good, but the problem is that the volume control on the remoto control doesn?t affect the amount of volume in the speakers (it?s very uncomfortable to stand up anytime you want to change the volume, and my speakers don?t have remote control). Is it possible to change some setting to control the audio output with the remote control of the tv??
Thanks