In this video
The most efficient way to use this trick is with a macro that splits an event on each barline. You can make the macro yourself inside S1, or you can use the one I’ve made. Copy /paste this code into
How to set up the “Split Each Bar” Macro
Copy/Paste this code from pastebin into your text editor:
Save the file as “Split Each Bar.studioonemacro” Note that you need to change “Save as type” to “All files”, otherwise it will not work

Then you can move the file into your macro folder, which on Windows is C:\Users\\Documents\Studio One\Macros
Done!
Here is the full tutorial
EDIT: As of S1 v4, the tempo track has been overhauled, and the Split Each Bar macro no longer splits the tempo track.