The answer should be something like:
Intensity swing effect - snap start
If you want all of your string lights to flash together:
Enter or tap the BPM
Stagger 0 %
FX rate per cycle
I think this will still look wrong though as you will have flash on one clap and flash off on the next clap. If you want the flash on to be on each clap, set the beats of the swing to be 0.5
If you wanted the string lights to flash odd/even (or anything else other than all together).
FX Rate = per fixture
Stagger = 50%
Overlap = 100%
Repeat = 2 (or whatever you want)
At this point you could also return your beats of the swing step to 1 each. This will still look correct as the audience would now still see lights coming on on each clap.
The clap section is quite long though. Three things will likely have to happen to have perfectly in sync flashes throughout the entire section (otherwise the flashes will probably start to drift out of sync)
- Your BPM in Vista has to be perfect.
- The band have to play perfectly in time.
- You have to trigger the effect at the perfect moment.
Sometimes doing a finger workout and manually flashing buttons is still the best option.