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ESI Operation Manual
Mode:
RMS or Peak.
RMS -
Root-mean-square or an “average of the magnitude of the
signal”. RMS represents the “true” energy content of a signal.
Peak
- Uses the peak amplitude of a signal to determine the
amplitude. The peak amplitude is a meaningful measurement in a
digital system because of the 96 db (16-bit) headroom limit.
Threshold:
Above, Center, Below, %
Above -
Only signal levels above the threshold % will be affected by
the compressor.
Center -
Signal levels above as well as below the threshold % will be
affected by the compressor.
Below -
Only signal levels below the threshold % will be affected by
the compressor.
% -
Determines the threshold level as a percentage of 100% of
16 bits.
Compression Ratio:
Variable from 0.01 : 1 to 99.8 : 1.
Determines the amount of compression or expansion. Ratios of greater
than 1:1 compress dynamic range. Ratios of less than 1:1 expand
dynamic range.
Compression -
Reduces the amount of dynamic range. Levels
remain more constant.
Expansion
- Expands the amount of dynamic range. Changes in
level are exaggerated.
Atk (Attack Time)
Determines how quickly the gain will be turned down. The attack time
is variable from 0 to 999 milliseconds.
Rel (Release Time)
Determines how quickly the gain will be turned up. The release time is
variable from 0 to 999 milliseconds.
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