--- session-script example to modulate plugin parameter(s) globally -- -- Ardour > Menu > Session > Scripting > Add Lua Script -- "Add" , select "Modulate Plugin Parameter", click "Add" + OK. -- ----------------------------------------------------------------------------- -- This script currently assumes you have a track named "Audio" -- which as a plugin at the top, where the first parameter has a range > 200 -- e.g. "No Delay Line" -- -- edit below.. -- plugin descriptor ardour { ["type"] = "session", name = "Modulate Plugin Parameter", license = "MIT", author = "Ardour Lua Task Force", description = [[An example session to modulate a plugin parameter.]] } function factory () -- generate a new script instance local count = 0 -- script-instance "global" variable -- the "run" function called at the beginning of every process cycle return function (n_samples) count = (count + 1) % 200; -- count process cycles local tri = math.abs (100 - count) -- triangle wave 0..100 -- get the track named "Audio" -- see also http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Session -- and http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Route local route = Session:route_by_name ("Audio") assert (not route:isnil ()) -- make sure it exists -- the 1st plugin (from top) on that track, ardour starts counting at zero -- see also http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Processor local plugin = route:nth_plugin (0) assert (not plugin:isnil ()) -- make sure it exists -- modulate the plugin's first parameter (0) from 200 .. 300 ARDOUR.LuaAPI.set_processor_param (plugin, 0, 200.0 + tri) end end