ardour { ["type"] = "EditorAction", name = "Faders to Trims", license = "MIT", author = "PSmith", description = [[Add 'Trim' plugins to all tracks. Move the fader value into the trim.]] } function action_params () return { } end function factory (params) return function () -- loop over all tracks for t in Session:get_tracks():iter() do fader_value = t:gain_control():get_value() v = math.log(fader_value, 10) trim_gain = 20*v fader_pos = 0 local proc; local i = 0; repeat -- find the fader proc proc = t:nth_processor (i) if (not proc:isnil() and proc:display_name () == "Fader") then fader_pos = i end i = i + 1 until proc:isnil() -- apply the trim trim = t:nth_processor (fader_pos+1) if (not trim:isnil() and trim:display_name () == "a-Amplifier") then --existing trim found; sum the trim and the fader gain, and set the trim to that value cur_gain = ARDOUR.LuaAPI.get_processor_param (trim, 0) ARDOUR.LuaAPI.set_processor_param (trim, 0, trim_gain+cur_gain) else --create a new Trim processor, and set its value to match the fader local a = ARDOUR.LuaAPI.new_luaproc(Session, "a-Amplifier"); if (not a:isnil()) then t:add_processor_by_index(a, fader_pos-1, nil, true) ARDOUR.LuaAPI.set_processor_param (a, 0, trim_gain) a = nil -- explicitly drop shared-ptr reference end end --zero the fader gain t:gain_control():set_value(1, PBD.GroupControlDisposition.NoGroup) end --foreach track end --function end --factory