just did a search on parallel compression:
https://en.wikipedia.org/wiki/Parallel_compression pretty cool actually. i may investigate this some more.
a couple of excerpts:
Parallel compressionFrom Wikipedia, the free encyclopedia
Parallel compression, also known as
New York compression, is a
dynamic range compression technique used in
sound recording and
mixing. Parallel compression, a form of upward compression, is achieved by mixing an unprocessed 'dry', or lightly compressed signal with a heavily compressed version of the same signal. Rather than bringing down the highest peaks for the purpose of
dynamic range reduction, it reduces the dynamic range by bringing up the softest sounds, adding audible detail.
[1] It is most often used on stereo percussion buses in recording and mixdown, on
electric bass, and on vocals in recording mixes and live concert mixes.
[2] Use
The human ear is sensitive to loud sounds being suddenly reduced in volume, but less so to soft sounds being increased in volume—parallel compression takes advantage of this difference.
[2][3] Unlike normal limiting and downward compression, fast
transients in music are retained in parallel compression, preserving the "feel" and immediacy of a live performance. Because the method is less audible to the human ear, the compressor can be set aggressively, with high ratios for strong effect.
[2] i like it!!!