nRiTeCh
Oracle
Finally bought Dell S2240L.
Pretty delighted and impressed with its ips panel, overall looks, thin bezel, and excellent pictures quality.
Esp. got for pretty cheap price. 
Now the main query.
I tried connecting my Tata HD set top box and pigged in my 2.1 speakers and wow it worked supercool!!
Fine..
Then tried my gpu 9800gt hdmi and yes that worked too but just the display part. But no voice from my speaker. Did no. of settings in Sounds (control panel) but nothing worked.
There are all confusing theories regarding the same on Google hence asking a proper resolution.
What do I need to do to get audio from my hdmi or monitors 3.5mm jack the same way sound comes along with video from set topbox???
Pretty delighted and impressed with its ips panel, overall looks, thin bezel, and excellent pictures quality.


Now the main query.
I tried connecting my Tata HD set top box and pigged in my 2.1 speakers and wow it worked supercool!!

Fine..
Then tried my gpu 9800gt hdmi and yes that worked too but just the display part. But no voice from my speaker. Did no. of settings in Sounds (control panel) but nothing worked.

There are all confusing theories regarding the same on Google hence asking a proper resolution.

What do I need to do to get audio from my hdmi or monitors 3.5mm jack the same way sound comes along with video from set topbox???