Universal Audio UAD Plug-Ins ver.7.5 - Manual (Page 160)

UAD Powered Plug-Ins Manual - 160 - Chapter 14: Fairchild Tube Limiter Collection
Fairchild 670
Legacy
The original version of the Fairchild 670 was released in January of 2004 for
the UAD-1 platform. To accommodate the limited DSP resources of the first-
generation UAD-1 hardware, the transformer and I/O distortion characteris-
tics were not modeled in this version of the plug-in.
The Fairchild 670 Legacy has a great sound and is very usable, especially in
situations where less distortion is desirable, or when there are not enough
DSP resources to use the second-generation models in the newer Fairchild
Tube Limiter Collection. It also has slightly less overall latency since it is not an
upsampled plug-in.
Note: The Fairchild 670 Legacy is included with the purchase of the Fairchild
Tube Limiter Collection if it is not already owned.
Mono/Stereo
Operation
Although the Fairchild 660 original hardware is a single-channel processor
and the Fairchild 670 original hardware is a dual-channel processor, all plug-
ins in the UAD Fairchild family can each be used on either mono or stereo
sources.
Fairchild 670 Operational Overview
Unique Controls Controls in the UAD Fairchild plug-ins are original Fairchild hardware con-
trols with the following exceptions:
• The VU meter and the Meter Switch are re-purposed, enabling the ability to
monitor input and output levels (the original hardware does not have this
ability). In the hardware, the function the meter switch is to enable calibrat-
ing the bias currents; this function is achieved automatically in the plug-in
when the
Balance control is in the default position.
• The Headroom (HR) control replaces the VU meter’s Zero control, which
originally corrected for component wear offsets in the VU meter pin.
• The Sidechain Link control is a common modification which had been per-
formed on the unit we modeled.
• Output Level, Controls Link, Sidechain Filter, Mix, and Headroom controls
are digital-only additions for the UAD plug-ins.
• The D.C. Threshold controls are original controls, however on the Fairchild
660 they were located on the rear panel.
Note: Not all controls are available in the Fairchild 670 Legacy plug-in.