Hello!
I am trying to make a library of 'instruments' for Teensy Audio, so folks can have a wide variety of sounds without too much experimentation.
I am having a hard time accessing the Teensy Audio library and instantiating AudioConnection objects from within a library.
I have an example sketch here:
https://github.com/cosmikwolf/InstrumentLibraryTest
I am unsure if I should pass a global AudioOutputI2S or AudioControl object into the initialization of the library. I can get the sketch to compile when sending an AudioOutput object in, but it crashes my Teensy 3.1.
Any guidance would be greatly appreciated!
Thanks!
-Tenkai
here is all the code from the github sketch above:
main file:
instrument library library header file:
instrument library cpp file:
I am trying to make a library of 'instruments' for Teensy Audio, so folks can have a wide variety of sounds without too much experimentation.
I am having a hard time accessing the Teensy Audio library and instantiating AudioConnection objects from within a library.
I have an example sketch here:
https://github.com/cosmikwolf/InstrumentLibraryTest
I am unsure if I should pass a global AudioOutputI2S or AudioControl object into the initialization of the library. I can get the sketch to compile when sending an AudioOutput object in, but it crashes my Teensy 3.1.
Any guidance would be greatly appreciated!
Thanks!
-Tenkai
here is all the code from the github sketch above:
main file:
Code:
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <instrument.h>
AudioControlSGTL5000 audioDevice;
AudioOutputI2S i2s1;
Instrument instrument1;
void setup(){
Serial.begin(9600);
Serial.println("Audio Setup debug 1");
AudioMemory(16);
Serial.println("Audio Setup debug 2");
audioDevice.enable();
Serial.println("Audio Setup debug 3");
audioDevice.volume(0.6);
Serial.println("Audio Setup debug 4");
instrument1.init(i2s1);
Serial.println("Audio Setup debug 5");
}
void loop(){
Serial.println("Audio loop start");
instrument1.noteOn(24);
delay(50);
instrument1.noteOff();
instrument1.noteOn(36);
delay(50);
instrument1.noteOff();
instrument1.noteOn(48);
delay(50);
instrument1.noteOff();
instrument1.noteOn(60);
delay(50);
instrument1.noteOff();
Serial.println("Audio loop end");
}instrument library library header file:
Code:
#ifndef Instrument_h
#define Instrument_h
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#define CHORUS_DELAY_LENGTH (16*AUDIO_BLOCK_SAMPLES)
// Allocate the delay lines for left and right channels
class Instrument
{
public:
Instrument();
void init(AudioOutputI2S i2s1);
void noteOn(uint8_t midiNote);
void noteOff();
float midiFreq[128] = { 8.17, 8.66, 9.17, 9.72, 10.30, 10.91, 11.56, 12.24, 12.97, 13.75, 14.56, 15.43, 16.35, 17.32, 18.35, 19.44, 20.60, 21.82, 23.12, 24.49, 25.95, 27.50, 29.13, 30.86, 32.70, 34.64, 36.70, 38.89, 41.20, 43.65, 46.24, 48.99, 51.91, 55.00, 58.27, 61.73, 65.40, 69.29, 73.41, 77.78, 82.40, 87.30, 92.49, 97.99, 103.82, 110.00, 116.54, 123.47, 130.81, 138.59, 146.83, 155.56, 164.81, 174.61, 184.99, 195.99, 207.65, 220.00, 233.08, 246.94, 261.62, 277.18, 293.66, 311.12, 329.62, 349.22, 369.99, 391.99, 415.30, 440.00, 466.16, 493.88, 523.25, 554.36, 587.32, 622.25, 659.25, 698.45, 739.98, 783.99, 830.60, 880.00, 932.32, 987.76, 1046.50, 1108.73, 1174.65, 1244.50, 1318.51, 1396.91, 1479.97, 1567.98, 1661.21, 1760.00, 1864.65, 1975.53, 2093.00, 2217.46, 2349.31, 2489.01, 2637.02, 2793.82, 2959.95, 3135.96, 3322.43, 3520.00, 3729.31, 3951.06, 4186.00, 4434.92, 4698.63, 4978.03, 5274.04, 5587.65, 5919.91, 6271.92, 6644.87, 7040.00, 7458.62, 7902.13, 8372.01, 8869.84, 9397.27, 9956.06, 10548.08, 11175.30, 11839.82, 12543.85 };
AudioSynthWaveform waveform1;
AudioSynthWaveform waveform2;
AudioSynthWaveform waveform3;
AudioEffectEnvelope ampEnvelope;
AudioEffectEnvelope filterEnvelope;
AudioMixer4 mixer1;
AudioFilterStateVariable filter1;
AudioOutputI2S i2s1;
short l_delayline[CHORUS_DELAY_LENGTH];
short r_delayline[CHORUS_DELAY_LENGTH];
private:
};
#endifinstrument library cpp file:
Code:
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <instrument.h>
Instrument::Instrument() {
}
void Instrument::init(AudioOutputI2S i2s1){
AudioConnection patchCord1(waveform1, 0, mixer1, 0);
AudioConnection patchCord2(waveform2, 0, mixer1, 1);
AudioConnection patchCord3(waveform3, 0, mixer1, 2);
AudioConnection patchCord4(mixer1, ampEnvelope);
AudioConnection patchCord5(waveform1, filterEnvelope);
AudioConnection patchCord6(ampEnvelope, 0, filter1, 0);
AudioConnection patchCord7(filterEnvelope, 0, filter1, 1);
AudioConnection patchCord8(filter1, 0, i2s1, 0);
AudioConnection patchCord9(filter1, 0, i2s1, 1);
Serial.println("instrument init begin");
this -> i2s1 = i2s1;
waveform1.begin(0.5, 220.1, WAVEFORM_SQUARE);
waveform2.begin(0.5, 440, WAVEFORM_SINE);
waveform3.begin(0.5, 440, WAVEFORM_SAWTOOTH);
mixer1.gain(0, 0.7);
mixer1.gain(1, 0.7);
mixer1.gain(2, 0.7);
ampEnvelope.delay(0);
ampEnvelope.attack(0);
ampEnvelope.hold(50.0);
ampEnvelope.decay(200.0);
ampEnvelope.sustain(1.0);
ampEnvelope.release(0.0);
filterEnvelope.delay(0);
filterEnvelope.attack(0);
filterEnvelope.hold(10.0);
filterEnvelope.decay(100.0);
filterEnvelope.sustain(1.0);
filterEnvelope.release(0.0);
filter1.frequency(400);
filter1.resonance(3);
filter1.octaveControl(5);
Serial.println("instrument init end");
}
void Instrument::noteOn(uint8_t midiNote){
waveform1.frequency(midiFreq[midiNote]);
waveform2.frequency(midiFreq[midiNote]);
waveform3.frequency(midiFreq[midiNote]);
ampEnvelope.noteOn();
filterEnvelope.noteOn();
}
void Instrument::noteOff(){
ampEnvelope.noteOff();
filterEnvelope.noteOff();
}
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