;) the other application is a noise gate in which you set a threshold in decibles, so that the gate cuts ot any sound that passes through it that is quieter than those decibles....for example, you sample a sound from cassette, the cassette hiss is at say 1db, you set the gate so that it cuts ot the hiss.....
not a good example but im pissed soi'll try and post a better response tomorow ;)