snapshot

libraries/audio-tools/tests-cmake/fft-effect/fft-effect.cpp

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+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/MiniAudioStream.h"
+#include "AudioTools/AudioLibs/FFTEffects.h"
+#include "AudioTools/AudioLibs/Desktop/File.h"
+
+AudioInfo info(16000, 2, 16);
+MiniAudioStream out; // final output of decoded stream
+FFTPitchShift effect(out);
+//FFTNop effect(out);
+//FFTWhisper effect(out);
+//FFTRobotize effect(out);
+WAVDecoder wav;
+EncodedAudioOutput decoder(&effect, &wav); // Decoding stream
+StreamCopy copier; 
+File audioFile;
+
+void setup(){
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);  
+
+  auto config = out.defaultConfig(TX_MODE);
+  config.copyFrom(info);
+  out.begin(config);
+
+  auto econfig = effect.defaultConfig();
+  econfig.copyFrom(info);
+  econfig.shift = -20;
+  effect.begin(econfig);
+
+  // setup file: must be in current directory
+  audioFile.open("hal1600.wav");
+
+  // setup I2S based on sampling rate provided by decoder
+  decoder.begin();
+
+  // begin copy
+  copier.begin(decoder, audioFile);
+
+}
+
+void loop(){
+  if (!copier.copy()) {
+    delay(5000);
+    exit(0);
+  }
+}