[App_rpt-users] How concerned should I be?

So I've been on my never ending quest of learning linux. So I was reading about simpleusb and usbradio...please no debates versus quality! I came across a reference to the top command and if asterisk takes up more than 20% or more I should consider simpleusb. Well one of my sites running two nodes which is having audio issues! Is swinging from 20-40% never dipping below 20% Thanks N1XBM Apparare Scientor Paratus Communicare Allstar Node # 27086, 41540, 41812, 42086