midi channel selection yeah :) - midi send message no :(

src/midi.h

@@ -0,0 +1,72 @@
+#pragma once
+
+#include "libremidi/libremidi.hpp"
+#include "libremidi/message.hpp"
+#include "libremidi/observer_configuration.hpp"
+#include "raylib.h"
+
+#include <iostream>
+#include <memory>
+#include <ostream>
+
+
+struct NoteTimer{
+	int midi_out;
+	int channel;
+	int note;
+	int velocity;
+	int start;
+	int length;
+};
+
+
+class Midi {
+
+	public:
+		Midi() {
+
+			for(const libremidi::input_port& port : obs.get_input_ports()){
+				midi_in_ports.push_back(port);
+			}
+			
+			for(const libremidi::output_port& port : obs.get_output_ports()){
+				midi_out_ports.push_back(port);
+			}
+			std::cout << midi_out_ports.size() << std::endl;
+		}
+
+		libremidi::observer obs;
+
+		std::vector<std::shared_ptr<libremidi::midi_out>> midi_outs;
+		std::vector<libremidi::input_port> midi_in_ports;
+		std::vector<libremidi::output_port> midi_out_ports;
+
+		std::vector<NoteTimer> notes;
+
+		float timer;
+
+		void open_midi_out(int midi_n){
+			std::cout << midi_n << std::endl;
+
+			auto out = std::make_shared<libremidi::midi_out>();
+			out->open_port(midi_out_ports[midi_n]);
+			midi_outs.push_back(out);
+		}
+
+		void note(int midi_out, int channel, int note, int velocity, int length){
+			midi_outs[midi_out]->send_message(libremidi::channel_events::note_on(channel, note, velocity));
+			notes.emplace_back(midi_out, channel, note, velocity, GetTime(), length);
+		}
+
+		void update(){
+			float time = GetTime();
+			for( auto it = notes.begin(); it != notes.end(); ++it){
+				if(time - it->start > ((float)it->length / 1000.0f)){
+					midi_outs[it->midi_out]->send_message(libremidi::channel_events::note_off(it->channel, it->note, it->velocity));
+					notes.erase(it);
+				}
+			}
+		}
+};
+
+