+ those left out will remain as they were before the /set_surface message was
+ sent. All parameters included must be valid. For example, setting send page
+ size would require also setting bank_size, strip_types, feedback and gain mode.
+ using only two parameters will set bank_size and strip_types. Sending /set_surface with
+ no parameters will result in Ardour returning a /set_surface message with the
+ current settings. Surfaces using /set_surface iiii b st fb gm as was the case
+ in versions of Ardour older than 5.10 will continue to work.