As far as the audio is concerned, there are a few options here. The initial volume is the default volume of the device when it starts. Next, the audio output is the output of the audio. Here, you can manually select the output for the audio. Lastly, the down sample USB can be enabled if you have any kind of trouble with the quality of the audio when playing. Usually, older boards may need to turn this on. The latest ones are just fine and do not need this option.