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