10
(e.g. 600 telephone lines etc.) level. This mode may be used for any application where maximum level is
to be obtained without crossing above a maximum amplitude protection line.
CONTROL AND MONITOR FUNCTIONS
Constant Threshold Operating Advantages
The constant threshold attack level provides a significant operating advantage by eliminating the need to
continually reset the input level for each new variation of compression ratio. Thus, comparison analysis
on simplified “A-B” basis is possible and the selection of the desired slope of the compression curve is
easier, more accurately determined, and requires less time.
No “De-Ess” Roll-Off
The need for “de-ess” or “de-emphasis” has been eliminated through the advanced design dual function,
independent compression and limiting of the Model V610. Conventional single function analog
compressor/limiters are not capable of reacting in time to protect against higher frequency sibilant
sounds without markedly sacrificing the performance of audio program material. Considerable
engineering design effort was required to develop a sophisticated dual function system. “De-ess” or “de-
emphasis” controls frequencies irrespective of whether or not transients or sibilant peaks are present.
The professional audio engineer is no longer in control of the final program output from such competitive
conventional units due to either “roll-off” of all high frequencies to avoid sibilant distortion from only a
few high frequencies, or tolerate sibilant distortion from high frequency peak overload.
THE FREQUENCY RESPONSE OF THE MODEL V610 DOES NOT CHANGE UNDER
NORMAL LINEAR AMPLIFICATION, LIMITING AND/OR COMPRESSION.
Input and Output Level Controls
THE INPUT CONTROL REGULATES THE AMOUNT OF COMPRESSION/LIMITING DESIRED. The system is
capable of receiving input signals 30 dB above the constant threshold attack level without degradation in
performance. The output control regulates the system output level and is located after the
compression/limiting plug-in module and before the final amplifier plug-in module. Continuously
variable control of the input and output signal levels is provided to allow any value of attenuation. The Vu
meter may be used to monitor accurately this attenuation.
Slope (Compression/Limiting Ratio) Control
The Model V610 provides both:
1. The widest range of compression/limiting ratios – from approximately 1.1:1 (approaching linear
amplification) to 100:1 (flat slope).
