Universal Audio UAD Plug-Ins ver.7.5 - Manual (Page 53)

UAD Powered Plug-Ins Manual - 53 - Chapter 4: API Vision Console Channel Strip
The 235L Noise Gate/Expander is one of the fastest noise gates available.
The API 235L can reduce noise in any type of program without losing any
part of the source. Its extreme flexibility and superb sound make it ideal for all
recording or mixing studio applications. The Expander function uses a 1:2 ra-
tio, allowing the signal to “sneak up” to the full signal level without any loss
of “under threshold” vocal or percussion nuances. Setting the threshold in the
Gate function to the desired level, then switching to the Expander mode is the
perfect workflow.
The API 215L is a unique passive, sweepable cut filter, designed specifically
to contour the sound in a way that preserves the natural tone of the signal. The
215L is a low pass filter with a slope of 6 dB per octave, and a high pass filter
with a slope of 12 dB per octave. The filters are isolated from each other with
the same discrete transistor buffer used in the famous 550 series equalizers.
API Vision Console Channel Strip Screenshot
Figure 6. The API Vision Console Channel Strip plug-in window