RDL ST-VP2 Automatic Ducking Module

RDL ST-VP2 Automatic Ducking Module
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RDL ST-VP2 Overview

  • 1Description
  • 2Music & Paging Management
  • 3Audio & Voice Sources
  • 4LEDs
  • 5Consistent Audio Levels

The ST-VP2 Automatic Ducking Module from RDL is a device designed to cut out music when a page is played over your audio system and automatically fade the music back into play when the page is finished. Use of the unit requires a line-level music source from a receiver, satellite decoder, tape, or CD source. The line-level voice source may be provided from a telephone paging system at line level or from a microphone that has been preamplifed to line level.

LEDs facilitate setup of the unit and also provide visual cues related to the correct operating levels of each of the (2) inputs. The music input includes an AGC compressor that maintains a consistent level of audio from varying music sources. This design feature ensures that the volume level does not change randomly and that voice-overs are not masked during paging.

Music & Paging Management

Use this module to manage a music feed and automatically fade in and out when a voice-over is played over your paging system.

Audio & Voice Sources

Use almost any line-level audio source for music and a line-level voice source to configure this unit for music and paging.


LEDs on this unit facilitate its setup and management by providing a visual indicator of line status.

Consistent Audio Levels

A special compressor on the module maintains a consistent level of volume with audio despite changes in the audio source.
UPC: 813721012173

RDL ST-VP2 Specs

ConstructionPlastic, metal
InputInputs: (2) balanced line level (or unbalanced)
Input impedance: 20KΩ
Input signal range: -20 dBu to +18 dBu
Output0dBu balanced (into 600Ω)
GainAdjustable using multi-turn potentiometer
THD & Noise< 0.02% (20Hz to 20kHz, no compression)
Frequency Response25Hz to 20kHz (+/- 1dB)
Noise< -70dB
Indicators(1) LED indicating proper music level
(1) LED indicating proper voice level
AGC Action18dB range
6dB compression at normal input level
Attack Time25 ms
Release Time2.5 seconds
Voice Trigger Level24dB below operating level
Music Fade DepthAdjustable 0dB to -25dB, or off
Music Recovery DelayAdjustable 2 to 4 seconds
PowerGround-referenced, 24 to 33VDC @ 35mA
DimensionsNot specified by manufacturer
Packaging Info
Package Weight0.19 lb
Box Dimensions (LxWxH)4.15 x 2.05 x 2.05"
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