48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
/**
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* @file streams-generator-freq.ino
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* @brief Test frequency detection
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* @author Phil Schatzmann
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* @copyright GPLv3
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**/
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#include "AudioTools.h"
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#include "Experiments/FrequencyDetection.h"
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AudioInfo info(16000, 1, 16);
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SineWaveGenerator<int16_t> sineWave(32000); // subclass of SoundGenerator with max amplitude of 32000
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GeneratedSoundStream<int16_t> sound(sineWave); // Stream generated from sine wave
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FrequncyZeroCrossingStream out; // or use FrequncyAutoCorrelationStream
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StreamCopy copier(out, sound);
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MusicalNotes notes; // copies sound into i2s
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int idx = 0;
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// Arduino Setup
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void setup(void) {
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// Open Serial
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
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// start the analog output
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out.begin(info);
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// Setup sine wave
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Serial.println("started...");
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}
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// Arduino loop - copy sound to out
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void loop() {
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float freq = notes.frequency(idx);
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sineWave.begin(info, freq);
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copier.copy();
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// print result
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Serial.print(notes.note(freq));
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Serial.print(" ");
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Serial.print(notes.frequency(idx));
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Serial.print("->");
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Serial.print(out.frequency(0));
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Serial.print(" ");
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Serial.println(notes.note(out.frequency(0)));
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if (++idx >= notes.frequencyCount()) stop();
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} |