it is safe to say that in the vast majority of cases, the sound in a lightsaber is a visual cue, and does not provide any real information. there are a few exceptions, such as the force push lightsaber, which can also be used to make sounds with the push of a button.
if you want to be able to enjoy your saber, it needs to be charged. a lightsaber requires energy to function, just as a flashlight does. the energy is stored in the lightsaber, and is released when you press the button. if you do not press the button, it will just sit there and not do anything. the lightsaber will be on standby mode, but will still take up power.
the lightsaber sounds should be played in standby mode. it will run off the battery, and will work, but it will not really do anything. if you want the lightsaber to actually do something, such as attack somebody, you will need to charge the saber. one way to do this is to charge the saber while it is connected to the computer. you can use an external battery, such as a 9 volt battery or a wall charger. the battery will provide extra power to the saber, making it stronger. you can also use a aaa adapter to charge the saber. you can use any of these methods to charge the saber.
while some sabers will have different settings to change the sounds, others will not. if a saber does not have a lot of settings to change, you will not be able to change it. another thing to remember is that some sabers can be made for both males and females.