redundant systems are a must in live shows!
if the A system fails switch to the B system.
working for a german band since 2000 I have build systems for several world-tours.
two errors so far in 10 years (but hundreds of shows)

1st time:
human error (the drummer accidently switched the system from 48kHz to 44.1kHz)
this was noticable for the audience - but hey, the band just started the song again (with corrected SR)
2nd time:
band did a rearrangement without telling the light / pyro / kinetic crews

hey, my system is TC master - and if the TC stops there are loads of red blinking lights everywhere

I have been watching that show, and realizing the "red light alert" nearly gave me a hard attack ...
however, the audience didn't notice
