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livetrax/share/scripts/s_ducks.lua

53 lines
1.7 KiB
Lua

ardour { ["type"] = "Snippet", name = "Ducks" }
function factory (params) return function ()
local chan_out = 2
if not Session:master_out():isnil() then
chan_out = Session:master_out():n_inputs ():n_audio ()
end
-- create two mono tracks
local tl = Session:new_audio_track (1, chan_out, nil, 2, "Ducks", ARDOUR.PresentationInfo.max_order, ARDOUR.TrackMode.Normal, true)
for t in tl:iter() do
t:set_strict_io (true)
-- switch tracks to monitor input
t:monitoring_control():set_value (ARDOUR.MonitorChoice.MonitorInput, PBD.GroupControlDisposition.NoGroup)
end
local src = tl:front ();
local dst = tl:back ();
assert (not src:isnil() and not dst:isnil())
-- add "ACE Compressor" to target track
local p = ARDOUR.LuaAPI.new_plugin (Session, "urn:ardour:a-comp", ARDOUR.PluginType.LV2, "")
assert (not p:isnil ())
dst:add_processor_by_index (p, 0, nil, true)
ARDOUR.LuaAPI.set_processor_param (p, 1, 300) -- 300ms release time
ARDOUR.LuaAPI.set_processor_param (p, 2, 4) -- 4dB Knee
ARDOUR.LuaAPI.set_processor_param (p, 3, 7) -- ratio 1:7
ARDOUR.LuaAPI.set_processor_param (p, 4, -25) -- threshold -20dBFS
ARDOUR.LuaAPI.set_processor_param (p, 9, 1) -- enable sidechain
-- add Send to src track before the fader
local s = ARDOUR.LuaAPI.new_send (Session, src, src:amp ())
assert (not s:isnil ())
-- mark as sidechain send
local send = s:to_send()
send:set_remove_on_disconnect (true)
-- now connect send to plugin's sidechain input
local src_io = send:output()
-- ACE Compressor already has a sidechain, and sidechain
-- pin connected. Other plugins see "plugin channel-map dev"
-- snippet how to change plugin pinout.
local dst_io = p:to_plugininsert ():sidechain_input ()
src_io:nth(0):connect (dst_io:nth (0):name ())
end end