Reading midi events from track via output ports in Lua

sollapse · November 6, 2022, 5:17pm

I’m currently attempting to parse the MIDI buffer for events from the track’s output ports in a session script; basically in a similar manner as the MIDI Tracer. However, when attempting to obtain a MIDIBuffer from a output port, if fails to populate with events. Does anyone have any suggestions?

tseaver · November 7, 2022, 9:09pm

Likely this is the example you are starting from, but just in case:

github.com

Ardour/ardour/blob/master/share/scripts/midimon.lua

ardour {
	["type"]    = "dsp",
	name        = "ACE MIDI Monitor",
	category    = "Visualization",
	license     = "GPLv2",
	author      = "Ardour Community",
	description = [[Display recent MIDI events inline in the mixer strip]]
}

local maxevents = 20
local ringsize = maxevents * 3
local evlen = 3
local hpadding, vpadding = 4, 2

function dsp_ioconfig ()
	return { { midi_in = 1, midi_out = 1, audio_in = -1, audio_out = -1}, }
end

function dsp_params ()
	return

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sollapse · November 7, 2022, 10:02pm

Thanks for the reply, but I was using the midi rewrite example. In this case I would like to check the midi events output from a track within a session script. However it seems the buffer is unable to access this, just hardware input.

system · February 7, 2023, 4:02am

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