I really wish you could add time signature changes to clips. I was trying to warp a song this weekend that had a few random bars of 6/4 interpresed with it's mostly 4/4 signature. It's almost impossible to deal with in Session view, the only way to get it sort of correct is to create a new clip for every single time signature change. In Arrangement view, you can just add the changes where they should be on the timeline and everything works perfectly. I'd like to be able to store those signature change locators with the clips themselves as opposed to attaching them to the timeline of the arrangement.
Ideally, I'd like a setup like the master/slave tempo deal, where the Master tempo will change to whatever the clip set to Tempo Master is when launched. IE if I launch a 6/4 clip designated as 'Time Signature Master', I'd like the master signature to change to 6/4. Now, I realize that may be a total nightmare to implement, so a decent alternative would be just to be able to have a clip's grid able to reflect the clips signature changes. Per the manual:
'8.1.3 Clip Signature
Using the Clip Signature fields, you can specify the time signature of a MIDI or audio clip. This setting is relevant only for display; it does not affect playback.
So, I'd assume if the grid doesn't affect playback, it should be able to be altered with time signature changes pretty easily. I would just like the grid I'm looking at the clip on to match what I'm hearing.
Trap music is not supported in the current version.