50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
#include "AudioTools.h"
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#include "AudioTools/AudioLibs/AudioEspressifFFT.h" // Using Espressif DSP Library
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AudioEspressifFFT fftc;
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SineWaveGenerator<int16_t> sineWave(32000);
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GeneratedSoundStream<int16_t> in(sineWave);
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StreamCopy copier(fftc, in);
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AudioInfo info(44100, 1, 16);
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float value = 0;
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// display fftc result
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void fftcResult(AudioFFTBase &fftc) {
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float diff;
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auto result = fftc.result();
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if (result.magnitude > 100) {
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Serial.print(result.frequency);
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Serial.print(" ");
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Serial.print(result.magnitude);
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Serial.print(" => ");
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Serial.print(result.frequencyAsNote(diff));
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Serial.print(" diff: ");
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Serial.print(diff);
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Serial.print(" - time ms ");
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Serial.print(fftc.resultTime() - fftc.resultTimeBegin());
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Serial.println();
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}
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}
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void setup() {
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
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// set the frequency
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sineWave.setFrequency(N_B4);
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// Setup sine wave
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auto cfg = in.defaultConfig();
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cfg.copyFrom(info);
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in.begin(cfg);
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// Setup FFT
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auto tcfg = fftc.defaultConfig();
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tcfg.copyFrom(info);
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tcfg.length = 4096;
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tcfg.callback = &fftcResult;
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fftc.begin(tcfg);
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}
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void loop() { copier.copy(); } |