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Ceci est une ancienne révision du document !
La Brutbox v1.0 est un contrôleur MIDI/USB que l'on peut connecter à son ordinateur. Un micro-contrôleur Teensy 2.0 envoie les données de 8 capteurs simples (mono signal) : pression, bouton, lumière, distance, rotatif.
Tous les fichiers de fabrication sur notre git.framasoft.org/resonance.
Nous réalisons un circuit imprimé pour connecter la Teensy 2.0 à des prises USB mâles, faciles à trouver et résistantes aux manipulations. Les capteurs sont reliés par une prise USB femelle.
Prises USB : on utilise les broches +, - et D+.
Suivre cette page de ressources sur la fabrication de circuits imprimés DIY.
Découpe de trois plaques en bois de 3mm d'épaisseurs et de dimensions 50x30cm, avec une machine à découpe laser. Munissez-vous d'une colle à bois pour assembler les capteurs. Nous ne collons pas la face du dessus pour ouvrir et montrer comment sont connectés les capteurs.
Code Teensy pour recevoir huit capteurs analogiques et envoyer les informations en MIDI.
// the MIDI channel number to send messages const int channel = 1; // the MIDI continuous controller for each analog input const int controllerA0 = 1; // const int controllerA1 = 2; // const int controllerA2 = 3; // const int controllerA3 = 4; // const int controllerA4 = 5; // const int controllerA5 = 6; // const int controllerA6 = 7; // const int controllerA7 = 8; // void setup() { } // store previously sent values, to detect changes int previousA0 = -1; int previousA1 = -1; int previousA2 = -1; int previousA3 = -1; int previousA4 = -1; int previousA5 = -1; int previousA6 = -1; int previousA7 = -1; elapsedMillis msec = 0; void loop() { // only check the analog inputs 50 times per second, // to prevent a flood of MIDI messages if (msec >= 50) { msec = 0; int n0 = analogRead(A0) / 8; int n1 = analogRead(A1) / 8; int n2 = analogRead(A2) / 8; int n3 = analogRead(A3) / 8; int n4 = analogRead(A4) / 8; int n5 = analogRead(A5) / 8; int n6 = analogRead(A6) / 8; int n7 = analogRead(A7) / 8; // only transmit MIDI messages if analog input changed if (n0 != previousA0) { usbMIDI.sendControlChange(controllerA0, n0, channel); previousA0 = n0; } if (n1 != previousA1) { usbMIDI.sendControlChange(controllerA1, n1, channel); previousA1 = n1; } if (n2 != previousA2) { usbMIDI.sendControlChange(controllerA2, n2, channel); previousA2 = n2; } if (n3 != previousA3) { usbMIDI.sendControlChange(controllerA3, n3, channel); previousA3 = n3; } if (n4 != previousA4) { usbMIDI.sendControlChange(controllerA4, n4, channel); previousA4 = n4; } if (n5 != previousA5) { usbMIDI.sendControlChange(controllerA5, n5, channel); previousA5 = n5; } if (n6 != previousA6) { usbMIDI.sendControlChange(controllerA6, n6, channel); previousA6 = n6; } if (n7 != previousA7) { usbMIDI.sendControlChange(controllerA7, n7, channel); previousA7 = n7; } } // MIDI Controllers should discard incoming MIDI messages. // http://forum.pjrc.com/threads/24179-Teensy-3-Ableton-Analog-CC-causes-midi-crash while (usbMIDI.read()) { // ignore incoming messages } }
// the MIDI channel number to send messages const int channel = 1; //Definir les sorties en fonction des canaux midi const int cc_A=0; const int cc_Abis=1; const int cc_B=2; const int cc_Bbis=3; const int cc_C=4; const int cc_Cbis=5; const int cc_D=6; const int cc_Dbis=7; const int cc_E=8; const int cc_Ebis=9; const int cc_F=10; const int cc_Fbis=11; const int cc_G=12; const int cc_Gbis=13; const int cc_H=14; const int cc_Hbis=15; void setup() {} int previous_n0a = -1; int previous_n0b = -1; int previous_n1a = -1; int previous_n1b = -1; int previous_n2a = -1; int previous_n2b = -1; int previous_n3a = -1; int previous_n3b = -1; int previous_n4a = -1; int previous_n4b = -1; int previous_n5a = -1; int previous_n5b = -1; int previous_n6a = -1; int previous_n6b = -1; int previous_n7a = -1; int previous_n7b = -1; elapsedMillis msec = 0; void loop() { // only check the analog cc_s 50 times per second (20ms), // to prevent a flood of MIDI messages if (msec >= 20) { msec = 0; int n0a = analogRead(A0) / 100; int n0b = analogRead(A0) - n0a*100; int n1a = analogRead(A1) / 100; int n1b = analogRead(A1) - n1a*100; int n2a = analogRead(A2) / 100; int n2b = analogRead(A2) - n2a*100; int n3a = analogRead(A3) / 100; int n3b = analogRead(A3) - n3a*100; int n4a = analogRead(A4) / 100; int n4b = analogRead(A4) - n4a*100; int n5a = analogRead(A5) / 100; int n5b = analogRead(A5) - n5a*100; int n6a = analogRead(A6) / 100; int n6b = analogRead(A6) - n6a*100; int n7a = analogRead(A7) / 100; int n7b = analogRead(A7) - n7a*100; // only transmit MIDI messages if analog cc_ changed // usbMIDI.sendControlChange(cc, value, channel); // control change if (n0a != previous_n0a) { usbMIDI.sendControlChange(cc_A, n0a, channel); previous_n0a = n0a; } if (n0b != previous_n0b) { usbMIDI.sendControlChange(cc_Abis, n0b, channel); previous_n0b = n0b; } // control change if (n1a != previous_n1a) { usbMIDI.sendControlChange(cc_B, n1a, channel); previous_n1a = n1a; } if (n1b != previous_n1b) { usbMIDI.sendControlChange(cc_Bbis, n1b, channel); previous_n1b = n1b; } // control change if (n2a != previous_n2a) { usbMIDI.sendControlChange(cc_C, n2a, channel); previous_n2a = n2a; } if (n2b != previous_n2b) { usbMIDI.sendControlChange(cc_Cbis, n2b, channel); previous_n2b = n2b; } // control change if (n3a != previous_n3a) { usbMIDI.sendControlChange(cc_D, n3a, channel); previous_n3a = n3a; } if (n3b != previous_n3b) { usbMIDI.sendControlChange(cc_Dbis, n3b, channel); previous_n3b = n3b; } // control change if (n4a != previous_n4a) { usbMIDI.sendControlChange(cc_E, n4a, channel); previous_n4a = n4a; } if (n4b != previous_n4b) { usbMIDI.sendControlChange(cc_Ebis, n4b, channel); previous_n4b = n4b; } // control change if (n5a != previous_n5a) { usbMIDI.sendControlChange(cc_F, n5a, channel); previous_n5a = n5a; } if (n5b != previous_n5b) { usbMIDI.sendControlChange(cc_Fbis, n5b, channel); previous_n5b = n5b; } // control change if (n6a != previous_n6a) { usbMIDI.sendControlChange(cc_G, n6a, channel); previous_n6a = n6a; } if (n6b != previous_n6b) { usbMIDI.sendControlChange(cc_Gbis, n6b, channel); previous_n6b = n6b; } // control change if (n7a != previous_n7a) { usbMIDI.sendControlChange(cc_H, n7a, channel); previous_n7a = n7a; } if (n7b != previous_n7b) { usbMIDI.sendControlChange(cc_Hbis, n7b, channel); previous_n7b = n7b; } } // MIDI Controllers should discard incoming MIDI messages. // http://forum.pjrc.com/threads/24179-Teensy-3-Ableton-Analog-CC-causes-midi-crash while (usbMIDI.read()) { // ignore incoming messages } }
Nous utilisons Pure Data pour générer les sons et les images. Nous nous basons sur notre framework Malinette.