HDMI has been around a long time in the HD TV industry, and even with computers its been a favorite for sometime. Its a one size fits all cable, and audio comes along for the ride.
Thats the reason why it MAY not be for you, especially if you have to use an adapter on one end of the other.
Lets say you have a computer with a DVI-D output. You buy a DVI-D to HDMI adapter, and you plug the other end into your monitor or TV. You turn it all on and OOOPS…no sound!
Wait, HDMI has sound right? thats because while the HDMI cable is CAPABLE of transmitting the sound, the DVI-D is NOT an audio port, its VIDEO ONLY!
In a set up like this, you will need to run the audio cables to listen to sound; either analog cables coming from the headphones jack, or digital audio cable like a TOSLINK, or look into a DVI & Audio to HDMI conversion box like this one below.