LA4X
Amplified Controller
user manual
VERSION 4.0
LA4X_UM_EN_4.0
w w w . l - a c o u s t i c s . c o m
36
4.9.3
AES/EBU GAIN
The AES/EBU input ports include a gain module, common to all ports, which can be set from -12 dB to +12 dB by
0.1 dB steps. It must be used when the fallback mode is enabled, a digital audio source is connected to input pair AB
and an analog audio source is connected to input pair CD. The AES/EBU GAIN allows aligning the digital audio source
level to the analog level value so as to ensure seamless fallback switch from AES/EBU to analog inputs in case of fallback
mode activation (refer to section 4.9.2).
The AES/EBU GAIN must be set according to the analog audio source’s calibration (based on manufacturer’s specs or
user measurements) and the amplified controller’s analog inputs calibration (0 dBfs for an input signal of +22 dBu). The
three following examples illustrate the most common cases:
If the analog audio source is calibrated at +18 dBu for 0 dBfs, set the AES/EBU GAIN to -4 dB.
If the analog audio source is calibrated at +24 dBu for 0 dBfs, set the AES/EBU GAIN to +2 dB.
If the analog audio source is calibrated at +22 dBu for 0 dBfs or if the fallback option is disabled or if a digital audio
source is connected to input pair CD, set the AES/EBU GAIN to +0 dB.
To set the
AES/EBU GAIN
follow these steps (see also Figure 37):
From the main menu select
INPUT SETTINGS
and press the
OK
key or the
encoder wheel
(or
ESC
to
1.
abort).
Turn the
encoder wheel
to select
AES/EBU GAIN
.
2.
While holding the
ESC
,
OK
or
OUT1
key, turn the
encoder wheel
to select an input gain value and release the
3.
key.
The setting applies in real-time when turning the
encoder wheel
.
Value setting resolution
Turn the
encoder wheel
to obtain a 0.1-step resolution.
Press and turn the
encoder wheel
to obtain a 1-step resolution.
Figure 37: Setting the AES/EBU GAIN
