A naive question from a non-musician, so be kind please.
I'm curious whether playing with a bottleneck slide requires different tuning than 'ordinary' playing. I've seen great players picking and fretting in what seem like a perfectly normal style, then introducing a bottleneck and playing in what feels like a totally different style, with no retuning.
In other cases, I've seen a player in the same situation switch guitars just to play bottleneck, presumably because it requires a different tuning.
So do the first class of players just learn to pick differently on a guitar tuned for bottleneck, or what?