Universal Audio UAD POWERED PLUG-INS ver.6.1 - Manual (Page 373)

UAD Powered Plug-Ins Manual - 373 - Chapter 36: Neve 33609 Compressor
• If you feed the same signal into both channels, you can have a lower thresh-
old with a lower ratio on one channel, and a higher threshold with a higher
ratio on the other channel. In this case, you will get a double knee, with the
lower ratio being used between the knees, and the higher ratio above both
knees.
• If you feed the same signal into both channels, you can have a lower thresh-
old with a faster release on one channel, and a higher threshold with a
slower release in the other channel. In this case, you will get a two-stage re-
lease after a transient, with the first channel releasing at the fast rate until
you get down to where the other one is; then the release will continue at the
slower rate.
Gratuitous Question
Is there any reason I would want to use stereo mode and still have the settings
for the two channels different?
Yes. Linking the sidechains simply prevents left-right image shifting. Threshold,
attack, and recovery can be set independently to cause the compressor to be
more sensitive to instruments which are panned to one side or the other. Out-
put controls can be set separately in order to correct an overall image shift at
the output.
Headroom Background
The hardware Neve 33609 can accept an analog signal level of approxi-
mately +26 dBu before undesirable signal clipping occurs. As the signal in-
creases up to this point however, desirable audio-path nonlinearities and
“good” harmonic distortion characteristics occur. This musically pleasing
“warmth” at higher levels is what gives the unit much of its revered sonic char-
acter. Because analog mixing consoles can typically output high signal levels,
audio engineers often take advantage of the ability to “push” the hardware
33609 into the colorful arena.
This complete pallet of sonic nuance, including the dynamic input response,
is captured in the UAD Neve 33609 model. The plug-in is calibrated inter-
nally so that 0 dBFS at its input is equivalent to an input level of approximately
+26 dBu on the 33609 hardware, where the coloring is more prominent. The
result is that a typical signal within a DAW will drive the UAD Neve 33609
into these “virtual” higher levels, resulting in fairly high amounts gain reduc-
tion.