i would like to know if any of you knows something about the horizontal red line which is on every audio track.. (i hope it may do not seems a noob question because i use FCP a lot and i've already did search around) what i mean is sometimes i just need to raise audio volume raising this red line.. BUT something comes to my eyes: the red line should stay in the MIDDLE of the waveform graph? does it act like a low/high pass filter like this? am i wrong?
listening to the final audio i think i should better raise volume with some filter (audio gain filter maybe?)