snapshot

libraries/audio-tools/tests-cmake/effects/effects.cpp

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+// Simple wrapper for Arduino sketch to compilable with cpp in cmake
+#include "Arduino.h"
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/PortAudioStream.h"
+
+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();
+}
+