Système USB / Micro / Casque
Introduction
Teensy permet de simuler une "carte son" USB, ce réglage permet:
- D'avoir le son de l'ordinateur (pc) sur la sortie headphones du teensy
- D'avoir le son du micro sur la sortie headphones (direct_mic) et en tant que micro USB (pc_mic)
- D'ajouter des effets au son du micro (reverb/chorus)
- D'ajouter des filtres / compression sur le micro
- De paramétrer (en partie pour le moment) les réglages des effets en MIDI.
Prérequis
Ce système nécessite un:
- Teensy (Testé sur 4.2)
- Teensy Audio Board
- Un PCB pour relier un micro jack
- Un micro au format Jack (Ici : un micro cravate Rode NT1)
- Un casque audio
Pour enregistrer le son du micro en direct sans latence, je vous conseille d'installer la demo de Fruity Loop pour avoir FL Studio Asio (bien meilleur que Asio4All)
https://www.image-line.com/
PCB Headphones
Paramétrages sur Audio System Design Tool
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>
// GUItool: begin automatically generated code
AudioInputUSB pc; //xy=62,74
AudioInputI2S mic; //xy=62,229
AudioEffectFreeverb reverb; //xy=206,161
AudioEffectChorus chorus; //xy=206,266
AudioMixer4 mic_effects; //xy=397,229
AudioFilterBiquad mic_post_filter; //xy=598,244
AudioOutputUSB pc_mic; //xy=617,394
AudioMixer4 direct_mic; //xy=758,160
AudioMixer4 left; //xy=877,48
AudioMixer4 right; //xy=892,115
AudioOutputI2S headphones; //xy=1136,59
AudioConnection patchCord1(pc, 0, left, 0);
AudioConnection patchCord2(pc, 1, right, 0);
AudioConnection patchCord3(mic, 0, reverb, 0);
AudioConnection patchCord4(mic, 0, mic_effects, 1);
AudioConnection patchCord5(mic, 1, chorus, 0);
AudioConnection patchCord6(reverb, 0, mic_effects, 0);
AudioConnection patchCord7(chorus, 0, mic_effects, 2);
AudioConnection patchCord8(mic_effects, 0, pc_mic, 0);
AudioConnection patchCord9(mic_effects, 0, pc_mic, 1);
AudioConnection patchCord10(mic_effects, mic_post_filter);
AudioConnection patchCord11(mic_post_filter, 0, direct_mic, 0);
AudioConnection patchCord12(direct_mic, 0, left, 1);
AudioConnection patchCord13(direct_mic, 0, right, 1);
AudioConnection patchCord14(left, 0, headphones, 0);
AudioConnection patchCord15(right, 0, headphones, 1);
AudioControlSGTL5000 audio; //xy=60,24
// GUItool: end automatically generated codeProgramme
float bass_level = -0.3;
float mid_bass_level = 0.5;
float midrange_level = 1.0;
float mid_treble_level = 1.0;
float treble_level = 1.0;
void setup() {
AudioMemory(100);
audio.enable(); //Enable Audio board
audio.audioPreProcessorEnable(); //Enable Preprocessor (eq/compressor)
audio.volume(1); //Headphones Volume
audio.inputSelect(AUDIO_INPUT_MIC); //Enable Analog Microphone
audio.micGain(5); //Mic gain to +5db
audio.eqBands(bass_level, mid_bass_level, midrange_level, mid_treble_level, treble_level); // Equalizer
mic_effects.gain(0, 0.6); // Reverb
mic_effects.gain(1, 0.3); // Dry
mic_effects.gain(2, 0); // Chorus
direct_mic.gain(1, 0.5); //Direct mic volume
reverb.roomsize(1); //Reverb room size / damping
reverb.damping(0.6);
//audio.autoVolumeControl(1, 100, 1, -18, 100, 1000); // Compressor/Limiter
//audio.autoVolumeEnable();
mic_post_filter.setHighShelf(0, 15000 , -50, 1); // Remove high level frequency
usbMIDI.setHandleControlChange(myControlChange); // Get Control Change Midi
//chorus1.begin(delayline,CHORUS_DELAY_LENGTH,n_chorus);
//chorus1.voices(n_chorus);
}
// Change int value to float value, useful for converting midi to 0.0/1.0
float mapfloat(float x, float in_min, float in_max, float out_min, float out_max) {
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
void myControlChange(byte channel, byte control, byte value) {
float floatvalue = mapfloat(value, 0, 127, 0.0, 1.0);
Serial.println(control);
if (control == 11) {
int percent = map(value, 0, 127, 0, 63);
audio.micGain(percent);
Serial.print("Microphone Gain :" );
Serial.println(percent);
}
switch (control) {
case 7:
mic_effects.gain(0, floatvalue);
Serial.print("Reverb Mix :");
Serial.println(floatvalue);
break;
case 8:
mic_effects.gain(1, floatvalue);
Serial.print("Dry Mix : ");
Serial.println(floatvalue);
break;
case 9:
reverb.damping(floatvalue);
Serial.print("Reverb Damp : ");
Serial.println(floatvalue);
break;
case 10:
reverb.roomsize(floatvalue);
Serial.println(floatvalue);
Serial.print("Reverb Room Size : ");
break;
case 12:
audio.volume(floatvalue);
Serial.println("Headphones Mix :");
Serial.println(floatvalue);
break;
case 13:
bass_level = mapfloat(value, 0, 127, -1.0, 1.0);
audio.eqBands(bass_level, mid_bass_level, midrange_level, mid_treble_level, treble_level);
Serial.println("Bass : ");
Serial.println(bass_level);
break;
case 14:
mid_bass_level = mapfloat(value, 0, 127, -1.0, 1.0);
audio.eqBands(bass_level, mid_bass_level, midrange_level, mid_treble_level, treble_level);
Serial.println("Mid bass : ");
Serial.println(mid_bass_level);
break;
case 15:
midrange_level = mapfloat(value, 0, 127, -1.0, 1.0);
audio.eqBands(bass_level, mid_bass_level, midrange_level, mid_treble_level, treble_level);
Serial.println("Mid Range : ");
Serial.println(midrange_level);
break;
case 16:
mid_treble_level = mapfloat(value, 0, 127, -1.0, 1.0);
audio.eqBands(bass_level, mid_bass_level, midrange_level, mid_treble_level, treble_level);
Serial.println("Mid Treble : ");
Serial.println(mid_treble_level);
break;
case 17:
treble_level = mapfloat(value, 0, 127, -1.0, 1.0);
audio.eqBands(bass_level, mid_bass_level, midrange_level, mid_treble_level, treble_level);
Serial.println("Treble : ");
Serial.println(treble_level);
break;
case 18:
direct_mic.gain(0, floatvalue);
Serial.println("Direct Mic :");
Serial.println(floatvalue);
break;
default:
Serial.print(control);
Serial.print(" : ");
Serial.println(value);
break;
}
}
void loop() {
usbMIDI.read();
}Open Stage Control
Lien de téléchargement : https://openstagecontrol.ammd.net/