Distributed Automatic Volume Control (DAVC)

The Distributed Automatic Volume Control (DAVC) is an algorithm which is using one or more microphones to measure the ambient audio/noise level, and adjusts the loudspeaker output level of the PA amplifier according to the ambient audio level.

The DAVC feature is available as from Turbine firmware 4.11.

To configure the DAVC, select Advanced AlphaCom > DAVC Settings.

DAVC Settings in the web interface

AVC Algorithm

• Adjustment Mode:
  • Positive Mode: Gain adjustment is from zero at AVC threshold level and adjusted postive. AVC Receiver should have a low base gain.
  • Negative Mode: Gain adjustment is from zero at AVC max level and adjusted with negative gain downwards. AVC Receiver should have a high base gain.