Good day,

I am pretty new to the world of music, so could you please explain to me what button means what on my amplifier? It is not like I am lazy and can not google it myself, I just don't understand the explanation on the Internet. For example, ''middle'' : it changes the tune of middle frequencies; wow, thanks, it explains a lot. I mean I do recall a few physics lessons from school, so I understand that sounds depends on frequency of the waves, but how exactly ''in words'' it changes the tune of the guitar?  Or why do I have 3 buttons for volume: volume, power level and gain? 

In advance, thanks for help.