Orban 5950 Technical Manual Operation 3-47
x AGC MASTER DELTA THRESHOLD – Allows you to offset the difference between compression thresholds of the
sum and difference channels in the master band.
x AGC BASS DELTA THRSHOLD – Same as AGC MASTER DELTA THRESHOLD but applies only to the bass band.
x AGC RATIO – Determines the ratio of the AGC. Infinity:1 applies the most control over the output of the AGC
block. 2:1 applies the least amount of control over the output of the AGC block. The compression ratio is the
ratio between the change in input level and the resulting change in output level, both measured in units of dB.
Previous Orban AGCs had compression ratios very close to 20:1, which produces the most consistent and
uniform sound. However, the 5950 compressor can reduce this ratio to as low as 2:1. This can add a sense of
dynamic range and is mostly useful for subtle formats like classical and jazz.
x AGC GATE THRESHOLD – Determines the lowest input level the AGC will detect as program content. All audio
below this level will be ignored by the AGC.
x AGC WINDOW SIZE – Determines the size of the “target zone” window in the AGC. (The Bass band is not
windowed.)
x AGC WINDOW RELEASE – Determines the rate of gain increase while program audio is within the WINDOW
SIZE.
x AGC STEREO COUPLING – Determines the gain difference of the Left and Right channels. OFF means the
channels are fully independent. 0dB means the left and right channels apply the same amount of gain
reduction.
x AGC BASS COUPLE – Determines the maximum amount of gain difference between the MASTER and BASS
bands.
x AGC MATRIX – Sets the AGC to operate in STEREO (L/R) or SUM/Difference (L-R) mode.
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