voice cracking

whenever i m listening music online or any kind of music ,sound is cracking is this because of sound driver or what is this ???

It could be from a lot of things...

Your soundcard/motherboard audio isn't working properly
There's dust in the port
A wire is loose, corroded, or bent

Is it coming from all speakers or just one?
Does it happen when you plug in other speakers?
Or, what happens when you do the same thing on another computer with the same speakers?

quote raavn111

whenever i m listening music online or any kind of music ,sound is cracking is this because of sound driver or what is this ???

Okay first check your volume level at two places, the actual speaker and the in Windows level. A lot of people crank these both up high and end up with bad sound. Your PC volume should be around 75% to 85% and then control volume from the speakers. The reason for this is a lot of cheap onboard sound solutions will begin to break up at higher levels. On the whole however I find this works well for good quality cards as well.

The reason I am suggesting you look at this is your specification that this is music related. If it was a general sound issue then I would look at drivers or hardware but music specific tends to be volume related as people like to "crank it".