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TU B E M I C
CHAN N E L STR I P
12. Release Control [4000 dB/sec - 10 dB/sec]
This control adjusts the amount of time it takes the compressor to recover from compression. 4000 dB/sec is the
fastest release setting. Theoretically, this means that it would take the compressor 1 second to fully recover from 4000
dB of compression. So if 10 dB of compression were applied with a release time setting of 4000 dB/sec, the release
time would be 2.5 milliseconds (4000/10 = 400, 1 sec/400 = .0025 seconds, which converts to 2.5 milliseconds).
10 dB/sec is the slowest release setting. If we use the previous example and apply 10 dB of compression using the
slowest release setting of 10 dB/sec, the release time would be 1 second, which is obvious but here’s the equation
anyway (10/10 = 1, 1 sec/1 = 1 second).
13. Limiter Control [0 dBu to OFF]
This control adjusts the limiter’s threshold, or the level at which limiting will begin to occur. Turning this control fully
clockwise will set the limiter threshold to the output clipping point of the 676, essentially turning the limiter off. Note that
the limiter will also be bypassed when the COMP/LIM ENABLE button is disengaged. The further the LIMITER control
is turned counter-clockwise, the lower the threshold will be.
This limiter is a dbx PeakPlus™ limiter and is designed to be used for level-critical applications, where you really want
to clamp down on the program material. The LIMIT LED will indicate when this threshold is exceeded and limiting is
occurring. The amount of gain reduction applied by the limiter can be seen in the VU meter when the G.R. METER
SELECTION button is active.
HINT:
When viewing gain reduction amount in the VU meter, the accumulative gain reduction applied by both
the compressor and limiter will be displayed. To see only the gain reduction applied by limiting, you can temporarily
disengage the compressor by setting the compressor’s THRESHOLD control to the full clockwise position. Once the
limiter gain reduction amount is verified in the VU meter, simply set the compressor’s THRESHOLD control back to
the original position. The same can be done with the LIMITER control to verify the amount of gain reduction applied
by compression.
14. Limit LED
This LED lights when the limiter’s threshold has been exceeded and limiting is occurring.