Allow the user to combine the outputs of more than one bus, in order to export all of them in one go.
Currently, if audio is routed to more than one bus, via Aux Sends, it's not possible to-
1) Re-combine the output of these buses so that everything (all buses and tracks) can be exported together in one go
2) Export more than one bus at a time
Because of this, the user is unable to use the (reasonably common) workflow of having tracks grouped to different reverb buses (e.g. strings reverb bus, brass reverb bus, percussion reverb bus etc), then export all the output of all these in one go.
Ideally, it should be possible to combine the output of all buses and tracks into one place (e.g. Master Out, master bounce track etc), then export the entire project in one go.
As discussed in this thread.