hi ...okay found the answer:
in app/controllers/rooms_controller.rb
"
# Join the user in and start the meeting.
opts = default_meeting_options
opts[:user_is_moderator] = true
# Include the user's choices for the room settings
@room_settings = JSON.parse(@room[:room_settings])
opts[:mute_on_start] = room_setting_with_config("muteOnStart")
opts[:require_moderator_approval] =
room_setting_with_config("requireModeratorApproval")
opts[:record] = record_meeting
begin
redirect_to join_path(@room,
current_user.name, opts,
current_user.uid)
"
so the room_settings are not used directly rather than only a few
options are looked up and stored as opts for the create meeting call.
To allow other options to be set in the room_settings this would have to
be changed to parse all options or directly submit the room_settings as
creation parameters.
cheers and thanks
Martin