L-Acoustics LA8 User Manual - page 51
Operation
FALLBACK MODE
Sound cuts in case of digital signal failure on the AES/EBU input can be avoided with the fallback option.
When automatic fallback is enabled (ON), the amplied controller automatically switches the analog input in case of
digital signal failure .
Switchover conditions
No clock, loss of lock, CRC error, bipolar encoding error or data slip triggers the automatic fallback.
Validity bit (invalid audio) value does not trigger the automatic fallback. Instead the signal is muted.
Reverting to digital input when the digital signal returns to a normal state is manual — refer to
INPUT MODE
. It can also
be done simultaneously for all amplied controllers in LA Network Manager.
When automatic fallback is disabled (OFF), sound is cut off in case of digital signal failure on the AES/EBU input, but
sound is automatically recovered when the signal returns to a normal state.
Enabling the fallback mode
‽FALLBACK MODE
OFF
‼※
OK
FALLBACK MODE
>OFF<
+OK
‽FALLBACK MODE
ON
‼※
Procedure
Precautions to avoid sound cuts or level differences upon fallback
The analog inputs must be connected to an audio source playing the same program as the digital audio
source connected to the AES/EBU input.
The level of the digital audio source connected to the AES/EBU input must be aligned to the level of the
analog audio source using AES/EBU GAIN — refer to section
AES/EBU GAIN
(p.52).
1. From the main menu, select INPUT SETTINGS.
2. Press the OK key or the encoder wheel to validate.
3. Turn the encoder wheel to select FALLBACK MODE.
4. Press the OK key or the encoder wheel to validate.
5. Turn the encoder wheel to select the setting (ON or OFF).
6. Press the OK key or the encoder wheel to validate.
51
LA8 user manual (EN) version 13.1