I've been to several firework displays where the synchronisation is actually pretty good. Specifically, a few by Kimbolton Fireworks in the UK.
I'd imagine one challenge is the area over which the crowd is spread. For large displays you can have the crowd spread over quite an area with quite a variation in arrival time of the sounds. I suppose that's just the normal sound engineering problem of a large gig - lots of speakers with suitably configured delay.
I'd imagine one challenge is the area over which the crowd is spread. For large displays you can have the crowd spread over quite an area with quite a variation in arrival time of the sounds. I suppose that's just the normal sound engineering problem of a large gig - lots of speakers with suitably configured delay.