For audiobooks I tend to start the book off at 1x for the first few hours because it's hard to follow while they are establishing characters and environment whe

For audiobooks I tend to start the book off at 1x for the first few hours because it's hard to follow while they are establishing characters and environment when you speed it up. Once I have a feel for those I gradually speed up to 1.4-1.7x (depending on the narrator).