You need to install the drivers for your audio device. to do so.
go to
1. support.dell.com and then
2. click on drivers and downloads and then
3. Enter your computer service tag (at the back of the tower, or the bottom of the laptop)
4. you will see the drivers for your computer
5. In the section AUDIO drivers. select the one which has driver and not the application.
6. Run it directly or save it and then run it.(As suits you)
7. Restart the computer.
8. Resolved.
www.support.dell.com
click start right click on computer select properties then device manager scroll to sound and video game controllers if you see a yellow question/exclamation mark or a red X the driver will need to update drivers
click start right click on computer select properties then device manager scroll to sound and video if you right click on sound and video then on high definition audio device select update driver software
click start control panel hardware and sound manage audio devices right click on your speaker select configure speakers
right click on the speaker icon in the bottom taskbar you will see an array of options select
playback devices make sure it has a green tick and the correct speakers are selected
be updated if you computer came with a motherboard disk the drivers could be on it although
once speakers are connected widows 7 should automatically update the drivers
click start control panel hardware and sound manage audio devices playback you might have to set a default go for via high definition audio then right click on speaker
you might have to configure them then select properties you will see tabs general level in this tab make sure your settings are loud enough also enhancements and advanced from the drop down
list in the advanced tab select dvd quality or another then apply
hope this helps
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