Installation guide

What types of control links are there?
The HAL System includes four types of control links (Level, Selector, Toggle, and Command). All controls
participating in a control link must be the same type. The four control types are described below:
Level controls
Level controls, which are generally associated with volume, have a continuous series of
states that are represented by a slider. The slider typically represents a relative position
within a defined range (for example, a percentage value between a configurable mini-
mum and maximum gain value). Several HAL processing blocks contain level controls
that you can include in a level control link. The most commonly used are the Level
processing block and the RAD and analog input and output blocks. The Level controls
on these blocks are typically connected to DR Level controls (found in the Control pal-
ette). Following is an image of a Level control (that has been linked) as well as a Level
control example:
Level Control Example: You want to provide users with remote volume control of a
podium microphone at the front of a room. Let's assume you're using a RAD2 for your
microphone input and a DR1 for the remote control hardware. Within Halogen, you
link the Gain control within the RAD2 block to the Level control within the DR1. You
install the DR1 in the appropriate location in the room, and the end user is able to use
the DR1 to control the volume of the microphone.
Selector controls
Selector controls do just what the name implies. They allow the end user to select an
CHAPTER 3: Key Audio Design Features
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