Hello friends. This is my firt post in this forum. So, please to meet all of you.
Paraller compression, AS I USE IT, is to mix two (or more) differently compressed cloned tracks with the original track.
Special case is when you create only one clone, compress it and mix it with original track, the so-called New York technique.
Every cloned track can be compressed, expanded, de-compressed or de-expanded with different purpouse.
For example one track can be used to de-compress fist atacks and recover dynamics or give punch in the trasients.
Other clone can be compressed (or eq) to avoid high frequency fried sounds.
Other clone can be used to repair holes in the mix, or to reduce the dynamics or wind instruments behind the lead voice, etc.
Then, you can mix in the desired/needed detail the tracks in order to get what you want second after second.
Why we use parallel compression?
Many times you want to expand some sound and compress other ones, but all of them are blended in a bad mix.
Honestly, this is not a creative technique, is a usefull method to have READY TO USE many versions of the original track and then concentrate into the mix of the clones. Of course is dangerous and tedious because you can loose the sense of the music and ends with a worst mix.
Yo can filter the frecuencies in order to get what you want from every clone. You can cut the lowfrecuency in one clones where you made a work thinking in medium frecuencies; in other clone you can cut high and medium parts and then play with the bottom dynamics, etc. It is better to make the clones from original track, name evey one according what we want to do (Low, midle, hi, midle-voice, brake pads, etc). In this way, we will understand better where the focus is when we process every clone. Then filter the clones to isolate the frecuency zones you need to work on them.
Then, process every filtered clone as needed (compressed, expanded, de-compressed or de-expanded).
Do not use paraller compression all the time. Many times you can use Waves C6 or C4, or Flux Alchemist to repair a track.
Of course better is to mix correctly every element of the mix instead to repair a bad mixed song.
At the end, the simply is best, nothing like a discret, light, elegant compression.