First to answer your question about the soundcard. Any souncard that supports Dolby Digital 5.1 will work with these speakers so long as the soundcard has a digital output to connect it into the speakers. Most cards that support 5.1 do have this output. But double check to be sure. As for the issue of the home theatre system: If these speakers have multiple inputs and they can decode the Dolby Digital signal then, yes you can connect multiple devices to these speakers. If not, you can purchase an AMP. This is how the setup will work: Computer----- DVD Player---AMP---Speakers TV----------- The AMP allows you to switch between multiple sources such as your theater system and PC and control the volume etc too. If the speakers don't already decode the Dolby Digital signal then you can buy an AMP that will do this. Check that the speakers decode the Dolby Digital signal and check that the soundcard decodes the Dolby Digital signal and has a digital output. I have a feeling that the soundcard you are talking about, decodes the Dolby Signal and in that case you can connect your speakers directly to the soundcard, but you won't be able to connect anything else such as your home theatre system to these speakers. .
No, the sound card is attached to the motherboard of the computer.
AS the board and CPU execute programs, they send associated sound signals to the sound card on your computer. The sound card converts the digital signal into analogue and sends that signal to the external port(s). Assuming a speaker is plugged in, the signal is carried over wire to the speaker (or headphone) speaker, where a electromagnet is used to move the speaker cone. This produces sound which can be heard.
the sound card,speaker ,drivers and settings at control panel ( volume controls or the computer's audio settings)
Listening to audio from a computer system requires a sound card. With the right type of sound card, you can turn a standard computer into a multimedia entertainment system. In order to make the sound card actually work, you'll also need a sound card driver. Various sound card manufacturers provide you with drivers that are made to make their devices perform.
Sound card configued to either speakers, headphones or to a midi device
Most computers come pre-installed with a sound card. This component allows you to listen to any audio coming from your computer or record audio into your system. Each sound card has its own specific driver to make it work successfully on a computer's operating system. Usually, a sound card will come fully equipped with an installation CD that includes the sound card driver. This driver directs the data connections to and from your sound card and the computer's operating system. And you can download a sound driver from the Interenet.Also,below the related link is not a bad choice for you if you need it.
The sound card of a computer provides an output - speaker or headphone) and usually an input too - microphone.The card itself is not an output but is an I/O device(input output device) [a bit of semantics here].
Sound card also known as audio card is the main hardware for computer's input and output of sound. The sound card as stated can receive and transmit the sound but have to have audio speakers attached to the card. As for the input you can connect a microphone and another source of sound (tv, music system, etc).
the sound card has a defect. or maybe you rebooted your computer improperly... , maybe the sound card is not compatible to your computer...
A PC without a sound card can beep from the in-built speaker that helps to find out about the faults in a system and produce sounds in programming languages like QBASIC.
The sound card functions by converting digital data into analog information. It also converts analog data into digital data. The digital signal processor inside of the sound card is responsible for this.
Electric current from the sound card is applied to an electromagnet changing magnetic field pushes a magnet back and forth,which is attached to the speaker cone.The moving speaker cone creates changes in the air pressure which your brain interprets as sound.