My neighbors are setting up outdoor movies with a few groups of people sitting 6-10 feet apart. The setup is a a smart projector and multiple Bluetooth speakers - one at each group, and the group members will bring their own speakers. It is analogous to a drive-in movie with a single large screen and multiple small speakers.
Let’s assume there are 4 Bluetooth speakers that were mostly made circa-2015 and we are trying to use what people currently have wherever possible. How might we keep the multiple Bluetooth speakers reasonably in sync so that there is not so much out-of-sync audio that it becomes distracting?
I am thinking of plugging in a 3.5mm splitter to the smart projector and then attaching multiple Bluetooth transmitters to the 3.5mm jack.
And plug in 4 simple Bluetooth transmitters to it?
...which can pair simultaneously with two speakers each