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