Many modern devices today have an aux audio input, or auxiliary input jack. This enables one to plug in a hardware device directly to another hardware device, like your computer, for easy connection.
The Use of an Aux Audio Input
Because more and more people are enjoying music, an increase in the purchases for MP3 players and iPods has been evident. Even the old CD players are still being used by many people, too. Some will even like their music loud and use the speakers of any existing stereo equipment. The problem is that finding the right cables can be intimidating and if they were easy to find, some will be a very expensive purchase.
A Direct Connection
However, some devices are installed with an aux audio input jack so that it is easier to plug in the MP3 player directly and listen to the music directly, without having software or any other cable. You can even allow your current car stereo to have direct connection with your iPod by installing an aux audio input. Just make sure that you have the right tools for the job and that you have an aux audio input adapter as well.