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effects.cpp
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effects.cpp
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// Simple wrapper for Arduino sketch to compilable with cpp in cmake
#include "Arduino.h"
#include "AudioTools.h"
#include "AudioLibs/PortAudioStream.h"
using namespace audio_tools;
PortAudioStream out;
SineWaveGenerator<int16_t> sine;
AudioEffects<SineWaveGenerator<int16_t>> effects(sine);
ADSRGain adsr(0.0001,0.0001, 0.9 , 0.0002);
GeneratedSoundStream<int16_t> in(effects);
StreamCopy copier(out, in);
uint64_t timeout=0;
float freq = N_C4;
void setup() {
Serial.begin(115200);
AudioLogger::instance().begin(Serial,AudioLogger::Warning);
// setup effects
effects.addEffect(adsr);
// Setup output
auto cfg = out.defaultConfig();
cfg.channels = 1;
cfg.bits_per_sample = 16;
cfg.sample_rate = 44100;
out.begin(cfg);
// Setup sound generation based on AudioKit settins
effects.begin(cfg);
sine.begin(cfg, 0);
in.begin(cfg);
sine.setFrequency(freq);
}
void loop() {
// simulate key press
if (millis()>timeout){
sine.setFrequency(freq);
adsr.keyOn();
timeout = millis()+3000;
}
// simulate key release
if (millis()>timeout+1000){
sine.setFrequency(freq);
adsr.keyOff();
}
// output audio
copier.copy();
}