lua: add midi bus

cyberic · February 6, 2017, 11:40am

Hello

Using lua, I would like to add a new MIDI bus, and route the output of other MIDI channels into the input of this bus.
Is it doable in lua?

If possible, could you provide some pointers to functions I could use?

Thank you
Eric

paul · February 6, 2017, 12:34pm

A bus is an ARDOUR:Route in Lua. You might start there in the docs http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Route

x42 · February 6, 2017, 5:29pm

Creating tracks or busses is a Session operation. For a MIDI Bus: Session:new_midi_route() – Note: the arguments to that function changed recently so best check the source:

github.com

Ardour/ardour/blob/master/libs/ardour/ardour/session.h#L667


		const ChanCount& input, const ChanCount& output, bool strict_io,
		boost::shared_ptr<PluginInfo> instrument,
		Plugin::PresetRecord* pset,
		RouteGroup* route_group, uint32_t how_many, std::string name_template,
		PresentationInfo::order_t,
		TrackMode mode = Normal
		);


	RouteList new_audio_route (int input_channels, int output_channels, RouteGroup* route_group, uint32_t how_many, std::string name_template, PresentationInfo::Flag, PresentationInfo::order_t);
	RouteList new_midi_route (RouteGroup* route_group, uint32_t how_many, std::string name_template, bool strict_io, boost::shared_ptr<PluginInfo> instrument, Plugin::PresetRecord*, PresentationInfo::Flag, PresentationInfo::order_t);


	void remove_routes (boost::shared_ptr<RouteList>);
	void remove_route (boost::shared_ptr<Route>);


	void resort_routes ();
	void resort_routes_using (boost::shared_ptr<RouteList>);


	AudioEngine & engine() { return _engine; }
	AudioEngine const & engine () const { return _engine; }


	static std::string default_track_name_pattern (DataType);

For inspiration, here’s a script which creates audio-busses and connects them: fan_out_instrument.lua: https://github.com/Ardour/ardour/blob/master/scripts/_fan_out_instrument.lua#L48

cyberic · February 7, 2017, 12:51pm

Thank you
I’ll try and post an example file if I succeed.

Russ_C · March 14, 2017, 12:56pm

Regards VCAs is there a method for creating these with lua? Presumably they are Routes, but I can’t seem to get VCAs lke I can with audio tracks, midi tracks and buses. Can’t see the info in Lua Bindings Class Reference. Any help much appreciated.

(Didn’t want to start a new thread (sorry I’m new to the forum so don’t know the exact protocol. Paul please move/delete as necessary)