Universal Audio UAD Plug-Ins ver.7.5 - Manual (Page 63)

UAD Powered Plug-Ins Manual - 63 - Chapter 4: API Vision Console Channel Strip
225L Type
The Type control switches the 225L compressor’s control side chain
signal to use either a feed-back (OLD) or feed-forward (NEW) de-
sign, providing two types of gain reduction. The default value is
Old.
Compressors typically have a side chain control signal based on either feed-
back or feed-forward designs. NEW feed-forward gain reduction is typical of
newer VCA type compressors that rely on RMS detectors for the side chain cir-
cuit. The OLD feed-back method is what most classic compressors use for the
side chain circuit.
Note: Unlike the original hardware, side chain processing via the 215L and
550L modules can be performed with this switch in the OLD position (the
hardware cannot use side chain filtering with feedback compression).
225L Meter
This meter displays, in dB, the amount of gain attenuation occurring in
the 225L module.
225L On
This button enables the 225L module. The module is active when the button’s
green indicator is lit.
Note: UAD DSP load is reduced when this module is inactive (unless DSP
LoadLock is enabled).