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AUDIO CONTROL
16.4 AUDIO PRE-PROCESS – THE AGC CONTROL
The two parts which are key to creating your own Sound footprint for the station can be found in the Audio Pre-Process
and Audio Process sections. The Input section also plays a key role in the audio processing chain, since discrepancies
between the input/output impedances or incorrect input sensitivity can generate audio disturbances or distortions. The
Falcon XT allows you to set the "sound" of the MPX signal, the analog signal, and the digital signal in a single operation.
This way, each station can create its own sound footprint, both technically and artistically.
16.4.1 AGC: Automatic Gain Control
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Automatic Gain Control (AGC) is one of the most important features of the processor, which offsets changes in the input
level, while maintaining the internal signal at a standardised level of 0 dBr. All the AGC parameters are customizable and
can be edited as required. Like all processors in the Falcon Audio Processor series and unlike many wideband audio
processors, the Falcon XT features two AGC features, which work alone on two separate bandwidths. This feature,
however, is typical in expensive, top-of-the-range audio processors. Using DSP-based technology, we can now offer a
product with high-level features and performance at a very competitive price. The AGC cut frequencies are listed below.
Type: Cross Frequency Slope
ACG -1 5 - 30Hz – 200 Hz 12dB/oct
ACG -2
200Hz 15kHz 12dB/oct
16.4.2 Drive
With this control, you can apply a variable gain ranging from 0.0 dB to
20.0 dB to the input signal of any unit. The work area inside the yellow end
sections is the "Safe Mode" work area, which is the area where you are
advised to stay in order to prevent unwanted sound effects introduced by
the audio processor.
16.4.3 Attack and Release
The AGC speed value is expressed in dB/seconds. i.e. the number of dB amplified
or attenuated in a second. The Falcon XT allows you to set two different working
speeds for the main AGC function:
the Attack speed and the Release speed, with the former generally set significantly
higher than the latter.
High AGC speed settings obviously allow the quick offsetting of considerable differences in the input signal level, which,
however, can lead to unpleasant "pumping" effects on the material applied to the audio processor input. We recommend
you use average speeds of about 2 or 3 dB/sec and work mainly on the audio sources connected to the processor, to
obtain a more uniform sound level.
16.4.4 Gate Threshold
The Gate Threshold parameter shows the threshold at which the AGC system
remains idle, without either amplifying or reducing the signal at its input. When
there is no signal applied to the input, the ‘AGC GATED‘ status is displayed on
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