There are all kinds of different video audio adapters that you may need when connecting up your home theater. Adapters can be used to change connection kind, change genders, divided a signal, and extend the length of a cable.
HDMI to DVI-D Adapter
This adapter is most commonly used when you need to connect a computer that has a DVI output to your HDTV. DVI is a digital connection capable of the same high resolutions HDMI provides. However, DVI is a video only signal and HDMI supports both audio and video.
S-Video to RCA Adapter
If you want to connect your computer to the TV the old fashioned way, this is the adapter you need. Just plug this adapter in the S-video output on your computer or laptop, and use a standard RCA cable to connect from the adapter into the composite video input (yellow) on the back of your TV. Unlike the HDMI to DVI adapter, this method will only allow you to characterize in standard definition quality resolutions.
HDMI Male to HDMI Female 90 Degree Adapter
This adapter is handy when you are trying to plug your HDMI into the TV, and you don’t want to bend the HDMI cable to connect it. Simply plug the male end of this adapter into the HDMI input on the TV, and then plug the HDMI cable straight into the adapter without bending the cable.
Audio Adapters and Splitters
3.5mm Stereo Male to RCA Female Adapter
This adapter is most commonly used to connect a S/PDIF stereo jack on a computer or portable device to the Digital Coaxial (S/PDIF) input on a receiver or surround sound processor with a standard RCA cable.
observe: Your output device must be able to transmit a digital coaxial signal. This adapter will not work if your device only outputs Left/Right analog stereo signals.
3.5mm Stereo Male to 2 RCA Female Adapter
This adapter is mainly used to output sound via the headphone jack on a computer or laptop, to a television with a standard 2 RCA audio cable (Red and White connectors).
RCA Male to 2 RCA Female Splitter
This adapter ideal if you only have one set of RCA (Red and White) inputs on the back of your TV or projector and need to connect two different audio supplies to the TV.
Audio Video Couplers
There are couplers made for almost any kind of connection. Couplers be make up of consistently two female jacks and are used to make two cables into one longer cable.
There are many more different kinds of adapters, and splitters, but you should now have a better understanding of video audio adapters. So start making those connections and good luck!