1026 Software and Programming Getting Started - Ivie

1026 Manual
Ivie Technologies, Inc. __________________________________________________________
dB of Attenuation
ALC 32dB Operating Range
Figure 30
Think of the ALC target level as the “loudness” in the room. There is a relationship between the target
level and the level appearing at the Master output. If the Master Gain Trim and Master Level Control
are both set at 0dB of attenuation, the level measured at the Master output will be the same as the target
level measured at the Channel Direct Out. If, for example, the ALC is maintaining a target signal
level of -10dBu, the Master Output level will measure -10dBu as well.
In Figure 30 above, the arrow shows the position of the ALC at 0dB of attenuation. Consider again the
analogy of the sound system with a remote control. The system was adjusted for maximum gain
before feedback. The remote control (the ALC in the analogy) is turned up as loud as it can go. The
system is just below feedback, but the person speaking can be nicely heard. The ALC (remote control
in the analogy) is at the top of its range. Now, imagine someone with a very loud voice comes to the
microphone and begins to speak. The person operating the remote control will need to reduce the
speaker’s level. Consider Figure 31 below:
dB of Attenuation
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
-32
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
-32
Figure 31
ALC (0dB, No Attenuation)
ALC (10dB, of Attenuation)
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