-
Notifications
You must be signed in to change notification settings - Fork 2
/
TwitchToMIDI.pde
266 lines (205 loc) · 6.53 KB
/
TwitchToMIDI.pde
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
import de.looksgood.ani.*;
import de.looksgood.ani.easing.*;
import themidibus.*;
import java.util.*;
import java.util.HashMap;
//the chat bot
Bot bot;
MidiBus myBus; // The MidiBus
/*
In Ableton Live I need to send a MIDI input to create a binding
if CONFIGURE is set to true at every mouse click it will modify a controller
starting from 0 and increasing every time
My process is:
set Live to MIDI mapping mode, select a knob, click on the processing app
then hardcode the controllers names/sliders in the right position
*/
boolean CONFIGURE = false;
int controllerIndex = 0;
//duration in seconds
int MAX_TWEEN = 60;
int channel = 1;
//default values for notes
int VELOCITY = 127; //whatever that is
int DURATION = 200; //ms
ArrayList<Slider> controllers;
ArrayList<Trigger> triggers;
void setup() {
size(400, 400);
background(0);
MidiBus.list(); // List all available Midi devices on STDOUT. This will show each device's index and name.
// Parent In Out
// | | |
myBus = new MidiBus(this, "loopMIDI Port", "loopMIDI Port");
// Create a new MidiBus. Replace "Bus 1" with the name of the device in the list obtained above
//Ani takes care of the transitions http://www.looksgood.de/libraries/Ani/
Ani.init(this);
//populate the ArrayList
controllers = new ArrayList<Slider>();
triggers = new ArrayList<Trigger>();
/*
MIDI controllers, it's a list of Slider objects taking care of the value changes and labeling
controllers.add(new Slider("rate", 0, 10, 100));
"rate" is the command to be typed in the chat
0 is the corresponding controller number
10 is the minimum value allowed 0-100
100 is the minimum value allowed 0-100
*/
controllers.add(new Slider("rate", 0, 10, 100));
//if min and max are not specified the default is 0 100
controllers.add(new Slider("depth", 1));
controllers.add(new Slider("wave", 2));
controllers.add(new Slider("dry/wet", 3));
controllers.add(new Slider("volume", 4));
/*
Triggers are just commands associated to a note and a duration (optional)
*/
triggers.add(new Trigger("dropBass", "C4"));
bot = new Bot();
}
void draw() {
//check all the controllers
for (int i = 0; i < controllers.size(); i++) {
Slider s = controllers.get(i);
//if slider is sliding
if (abs(s.value - s.target) > 1 && s.target != -1) {
//println( s.id + ": " + s.value +" -> "+s.target);
myBus.sendControllerChange(channel, s.cc, s.value); // Send a controllerChange
} else if (s.target != -1) {
//end point
s.value = s.target;
myBus.sendControllerChange(channel, s.cc, s.value); // Send a controllerChange
}
}
}
void parseCommand(String cmd) {
//attempt to parse a command from the chat
String[] c = split(cmd, ' ');
//go through all the controller ids
println("Parsing message "+c[0]+"...");
/*
//you can let users send notes directly but it's probably a bad idea
int pitch = noteToPitch(c[0]);
//valid note
if (pitch != -1) {
println("Send note "+ pitch);
myBus.sendNoteOn(channel, pitch, VELOCITY); // Send a Midi noteOn
delay(DURATION);
myBus.sendNoteOff(channel, pitch, VELOCITY); // Send a Midi nodeOff
}
*/
//check all the triggers
for (int i = 0; i < triggers.size(); i++) {
Trigger t = triggers.get(i);
//this is the command!
if (cmd.toUpperCase().equals(t.id.toUpperCase())) {
t.go();
}
}
if (c.length >= 2) {
//check all the controllers
for (int i = 0; i < controllers.size(); i++) {
Slider s = controllers.get(i);
String id = s.id.toLowerCase();
//first member is the same as controller id
if (id.equals(c[0].toLowerCase())) {
//key matches let's see if the other members are valid
int valuePercent = int(c[1]);
valuePercent = constrain(valuePercent, s.min, s.max);
int MIDIvalue = int(map(valuePercent, 0, 100, 0, 127));
//default value 1 sec
int time = 1;
if (c.length >= 3) {
time = int(c[2]);
time = constrain(time, 0, MAX_TWEEN);
}
println("Command detected "+id+" - MIDI value "+MIDIvalue+" - time (s) "+time);
s.target = MIDIvalue;
//triggers the gradual transition with Ani
//you can add a fifth parameter to determine the easing eg Ani.LINEAR
//http://www.looksgood.de/libraries/Ani/
Ani.to(s, time, "value", MIDIvalue);
}//controlle
}//controller loop
}//two members
}
void mousePressed() {
if (CONFIGURE) {
println("Sending input of controller: "+controllerIndex);
myBus.sendControllerChange(channel, controllerIndex, round(random(0, 127)));
controllerIndex++;
}
}
//https://www.midimountain.com/midi/midi_note_numbers.html
//position is number to multiply by octave
//yeah there's is no flat mapping
String[] NOTES = {"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"};
int noteToPitch (String p) {
p = p.toUpperCase();
int pitch = -1;
int note = -1;
int octave = 0;
if (p.length() == 2 || p.length() == 3) {
String noteString = "";
if (p.length() == 2) {
noteString = p.substring(0, 1);
octave = Character.getNumericValue(p.charAt(1));
}
if (p.length() == 3) {
noteString = p.substring(0, 2);
octave = Character.getNumericValue(p.charAt(2));
}
for (int i=0; i<NOTES.length; i++) {
if (noteString.equals(NOTES[i]))
note = i;
}
if (note != -1) {
pitch = note + octave*12;
}
}
return pitch;
}
void delay(int time) {
int current = millis();
while (millis () < current+time) Thread.yield();
}
//associates a command to a midi note
class Trigger {
String id = "";
int pitch = 0;
int duration = DURATION;
Trigger(String _id, String note) {
this.pitch = noteToPitch(note);
this.id = _id;
}
Trigger(String _id, String note, int _d) {
this.pitch = noteToPitch(note);
this.id = _id;
this.duration = _d;
}
//trigger the not
void go() {
myBus.sendNoteOn(channel, this.pitch, VELOCITY); // Send a Midi noteOn
delay(this.duration);
myBus.sendNoteOff(channel, this.pitch, VELOCITY); // Send a Midi nodeOff
}
}
//slider class
class Slider {
String id = "";
int cc = 0; //controller value
int value = 0;
int target = -1; //target never set
int min = 0;
int max = 100;
Slider(String _id, int _cc) {
this.cc = _cc;
this.id = _id;
}
Slider(String _id, int _cc, int _min, int _max) {
this.cc = _cc;
this.id = _id;
this.min = _min;
this.max = _max;
}
}