Ability to choose which Time Stretch library to use

I had some questions about time stretching if anyone is interested.

In the past Ardour used the main time stretch library available in Linux called Rubberband. Recently the time stretch library called StaffPad was released as open source and has since been added to Ardour 9

1.) Did StaffPad replace Rubberband completely?
(I doubt this because this would be an issue with saved user sessions that already used Rubberband)
(Although I have read that WSOLA was used before but was replaced entirely by Rubberband so maybe this is true?)

2.) If both Rubberband and StaffPad are both available, I was wondering how would a user be able to choose which library to use?
When using Stretch Mode a dialog opens up but it only gives generically labeled properties that that algorithm will use for the time stretch process, shown in the “Contents” drop down.
Does anyone know if there is a way to specifically choose between the 2 libraries mentioned?

Thank You

  1. No.
  2. The options presented represent all available libraries.