Randy Merrill demonstrates the use of gain automation on the master track to achieve a more consistent vocal presence and overall loudness throughout a song. By carefully adjusting the gain, he ensures that quieter sections are brought up without losing the natural dynamics and nuances of the performance.
This technique reduces the dynamic range, allowing for a more controlled and natural increase in loudness, which in turn places less strain on the final limiter. It's important to not overdo this process to retain the song's dynamic arc and emotional impact.
Additionally, Merrill highlights the use of different EQ and limiting plugins for various sections of the song, adapting the processing chain to suit the evolving dynamics and tonal balance. This approach helps achieve a polished and cohesive final mix.