Hi there!
Currently I am switching over and moving projects to Ardour 3 and there is one option from Ardour 2 that I am missing:
I used to edit the ardour.rc file which was located on /home/.ardour2 to set set the “track-buffer-settings”. Now with Ardour 3 there is no hidden folder on the home partition anymore but i guess that this file still exists somewhere else?

kind regards

It lives in $XDG_CONFIG/ardour3 … $XDG_CONFIG is typicall ~/.config so the full path in ~/.config/ardour3/ardour.rc

In addition to that the buffers are now configurable via the GUI: Edit -> Preferences -> Audio