Gain Plug-in

Gain amplifies (or reduces) the signal by a specific decibel amount. It is very useful for quick level adjustments when you are working with automated tracks during post-processing—for example, when you have inserted an effect that doesn’t have its own gain control, or when you want to change the level of a track for a remix version.

Figure. Gain window.

Using Phase Inversion

Inverting phase is useful for dealing with time alignment problems, particularly those caused by simultaneous recording with multiple microphones. When you invert the phase of a signal heard in isolation, it sounds identical to the original. When the signal is heard in conjunction with other signals, however, phase inversion may have an audible effect. For example, if you place microphones above and below a snare drum, you may find that inverting the phase of either microphone can improve (or ruin) the sound. As always, rely on your ears.