Lua script for panning

sc3sc3 · August 19, 2020, 9:35pm

Hi, I looked through the list of Lua scripts in the Ardour repository,
but couldn’t find a script that does anything with panning.
I’m interested in automating panning, a pulsating movement from left to right and back.
Does anybody have a ‘panning’ script to get me started ?
Thanks
Regards

Reaw · August 28, 2020, 4:58pm

Hey, if you mean using automation curves for panning, then you have to do as on these pictures

But if you mean that you want to have panning made automatically then you will need some plugin to do that. I personally use PanCake from Cableguys, it’s really nice. But it’s not open-source and I think it’s not available on Linux if that is a problem for you.

sc3sc3 · August 28, 2020, 5:53pm

Hi Philippe, thanks for your answer, but that’s not what I meant.
I would like to experiment with panning programmatically through the Lua api

x42 · August 28, 2020, 7:08pm

Have a look at the Fader Automation snippet:

github.com

Ardour/ardour/blob/master/share/scripts/s_fader_automation.lua#L16



	-- get selected tracks
	rl = Editor:get_selection ().tracks:routelist ()

	-- prepare undo operation
	Session:begin_reversible_command ("Fancy Fade Out")
	local add_undo = false -- keep track if something has changed

	-- iterate over selected tracks
	for r in rl:iter () do
		local ac = r:amp ():gain_control () -- ARDOUR:AutomationControl
		local al = ac:alist () -- ARDOUR:AutomationList (state, high-level)

		-- set automation state to "Touch"
		ac:set_automation_state (ARDOUR.AutoState.Touch)

		-- query the value at the playhead position
		local g = al:eval (playhead)

		-- get state for undo
		local before = al:get_state ()

and simply replace line 16 with r:pan_azimuth_control().

(have a look at https://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Route, search for AutomationControl)

As for plugins there’s PingPongPan available from https://github.com/DISTRHO/DPF-Plugins or the dpf-plugins pack from https://kx.studio/Repositories:Plugins

system · September 25, 2020, 7:08pm

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