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This commit is contained in:
David Gwilliam
2026-02-12 21:00:02 -08:00
parent 77f8236347
commit 8bdbf227ca
1141 changed files with 1010880 additions and 2 deletions
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51
libraries/audio-tools/examples/tests/fft/fft-cmsis/fft-cmsis.ino Normal file
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#include "AudioTools.h"
#include "AudioTools/AudioLibs/AudioCmsisFFT.h" // using CMSIS DSP
AudioCmsisFFT fft; // or AudioKissFFT
SineWaveGenerator<int16_t> sineWave(32000);
GeneratedSoundStream<int16_t> in(sineWave);
StreamCopy copier(fft, in);
AudioInfo info(44100, 1, 16);
float value = 0;
// display fft result
void fftResult(AudioFFTBase &fft) {
float diff;
auto result = fft.result();
if (result.magnitude > 100) {
Serial.print(result.frequency);
Serial.print(" ");
Serial.print(result.magnitude);
Serial.print(" => ");
Serial.print(result.frequencyAsNote(diff));
Serial.print(" diff: ");
Serial.print(diff);
Serial.print(" - time ms ");
Serial.print(fft.resultTime() - fft.resultTimeBegin());
Serial.println();
}
}
void setup() {
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
while(!Serial);
// set the frequency
sineWave.setFrequency(N_B4);
// Setup sine wave
auto cfg = in.defaultConfig();
cfg.copyFrom(info);
in.begin(cfg);
// Setup FFT
auto tcfg = fft.defaultConfig();
tcfg.copyFrom(info);
tcfg.length = 4096;
tcfg.callback = &fftResult;
fft.begin(tcfg);
}
void loop() { copier.copy(); }

50
libraries/audio-tools/examples/tests/fft/fft-esp32/fft-esp32.ino Normal file
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#include "AudioTools.h"
#include "AudioTools/AudioLibs/AudioESP32FFT.h" // Using ESP32FFT
AudioESP32FFT fftc; // or AudioKissFFT
SineWaveGenerator<int16_t> sineWave(32000);
GeneratedSoundStream<int16_t> in(sineWave);
StreamCopy copier(fftc, in);
AudioInfo info(44100, 1, 16);
float value = 0;
// display fftc result
void fftcResult(AudioFFTBase &fftc) {
float diff;
auto result = fftc.result();
if (result.magnitude > 100) {
Serial.print(result.frequency);
Serial.print(" ");
Serial.print(result.magnitude);
Serial.print(" => ");
Serial.print(result.frequencyAsNote(diff));
Serial.print(" diff: ");
Serial.print(diff);
Serial.print(" - time ms ");
Serial.print(fftc.resultTime() - fftc.resultTimeBegin());
Serial.println();
}
}
void setup() {
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
// set the frequency
sineWave.setFrequency(N_B4);
// Setup sine wave
auto cfg = in.defaultConfig();
cfg.copyFrom(info);
in.begin(cfg);
// Setup FFT
auto tcfg = fftc.defaultConfig();
tcfg.copyFrom(info);
tcfg.length = 4096;
tcfg.callback = &fftcResult;
fftc.begin(tcfg);
}
void loop() { copier.copy(); }

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

50
libraries/audio-tools/examples/tests/fft/fft-ifft/fft-ifft.ino Normal file
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#include "AudioTools.h"
#include "AudioTools/AudioLibs/AudioRealFFT.h" // using RealFFT
#include "AudioTools/AudioLibs/AudioBoardStream.h"
AudioInfo info(8000, 1, 16);
AudioRealFFT afft; // or AudioKissFFT
Hann hann;
BufferedWindow buffered(&hann);
SineWaveGenerator<int16_t> sineWave(32000);
GeneratedSoundStream<int16_t> in(sineWave);
StreamCopy copier(afft, in);
//CsvOutput<int16_t> out(Serial);
//I2SStream out;
AudioBoardStream out(AudioKitEs8388V1);
StreamCopy copierIFFT(out, afft);
// process fft result
void fftResult(AudioFFTBase &fft) {
// copy ifft result to output
while (copierIFFT.copy());
}
void setup() {
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
// set the frequency
sineWave.setFrequency(N_B4);
// Setup sine wave
auto cfg = in.defaultConfig();
cfg.copyFrom(info);
in.begin(cfg);
// Setup FFT
auto tcfg = afft.defaultConfig(RXTX_MODE);
tcfg.copyFrom(info);
tcfg.length = 1024;
//tcfg.window_function = &buffered;
//tcfg.stride = 512;
tcfg.callback = fftResult;
afft.begin(tcfg);
// setup output
auto ocfg = out.defaultConfig(TX_MODE);
ocfg.copyFrom(info);
out.begin(ocfg);
}
void loop() { copier.copy(); }

49
libraries/audio-tools/examples/tests/fft/fft-kiss/fft-kiss.ino Normal file
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#include "AudioTools.h"
#include "AudioTools/AudioLibs/AudioKissFFT.h" // Using KissFFT
AudioKissFFT fft; // or AudioKissFFT
SineWaveGenerator<int16_t> sineWave(32000);
GeneratedSoundStream<int16_t> in(sineWave);
StreamCopy copier(fft, in);
AudioInfo info(44100, 1, 16);
float value = 0;
// display fft result
void fftResult(AudioFFTBase &fft) {
float diff;
auto result = fft.result();
if (result.magnitude > 100) {
Serial.print(result.frequency);
Serial.print(" ");
Serial.print(result.magnitude);
Serial.print(" => ");
Serial.print(result.frequencyAsNote(diff));
Serial.print(" diff: ");
Serial.print(diff);
Serial.print(" - time ms ");
Serial.print(fft.resultTime() - fft.resultTimeBegin());
Serial.println();
}
}
void setup() {
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
// set the frequency
sineWave.setFrequency(N_B4);
// Setup sine wave
auto cfg = in.defaultConfig();
cfg.copyFrom(info);
in.begin(cfg);
// Setup FFT
auto tcfg = fft.defaultConfig();
tcfg.copyFrom(info);
tcfg.length = 4096;
tcfg.callback = &fftResult;
fft.begin(tcfg);
}
void loop() { copier.copy(); }

49
libraries/audio-tools/examples/tests/fft/fft-real/fft-real.ino Normal file
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#include "AudioTools.h"
#include "AudioTools/AudioLibs/AudioRealFFT.h" // using RealFFT
AudioRealFFT fft; // or AudioKissFFT
SineWaveGenerator<int16_t> sineWave(32000);
GeneratedSoundStream<int16_t> in(sineWave);
StreamCopy copier(fft, in);
AudioInfo info(44100, 1, 16);
float value = 0;
// display fft result
void fftResult(AudioFFTBase &fft) {
float diff;
auto result = fft.result();
if (result.magnitude > 100) {
Serial.print(result.frequency);
Serial.print(" ");
Serial.print(result.magnitude);
Serial.print(" => ");
Serial.print(result.frequencyAsNote(diff));
Serial.print(" diff: ");
Serial.print(diff);
Serial.print(" - time ms ");
Serial.print(fft.resultTime() - fft.resultTimeBegin());
Serial.println();
}
}
void setup() {
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
// set the frequency
sineWave.setFrequency(N_B4);
// Setup sine wave
auto cfg = in.defaultConfig();
cfg.copyFrom(info);
in.begin(cfg);
// Setup FFT
auto tcfg = fft.defaultConfig();
tcfg.copyFrom(info);
tcfg.length = 4096;
tcfg.callback = &fftResult;
fft.begin(tcfg);
}
void loop() { copier.copy(); }

62
libraries/audio-tools/examples/tests/fft/fft-topn/fft-topn.ino Normal file
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#include "AudioTools.h"
#include "AudioTools/AudioLibs/AudioRealFFT.h" // using RealFFT
AudioRealFFT fft; // or AudioKissFFT
SineWaveGenerator<int16_t> sineWave(32000);
GeneratedSoundStream<int16_t> in(sineWave);
StreamCopy copier(fft, in);
AudioInfo info(44100, 1, 16);
float value = 0;
static const int N = 5;
// check fft result
void fftResult(AudioFFTBase &fft) {
// build result array
AudioFFTResult all[fft.size()];
for (int j=0;j<fft.size();j++){
all[j].bin = j;
all[j].magnitude = fft.magnitude(j);
all[j].frequency = fft.frequency(j);
}
// sort descending
std::sort(all, all + fft.size(), [](AudioFFTResult a, AudioFFTResult b){ return a.magnitude > b.magnitude; });
// get top 5
AudioFFTResult topn[N];
fft.resultArray(topn);
// compare the topn with sorted result
for (int j=0;j<N;j++){
Serial.print(all[j].bin);
Serial.print(":");
Serial.print(topn[j].bin);
Serial.print(" ");
assert(all[j].bin==topn[j].bin);
}
Serial.print(" -> TOP: ");
Serial.println(fft.result().bin);
}
void setup() {
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
// set the frequency
sineWave.setFrequency(N_B4);
// Setup sine wave
auto cfg = in.defaultConfig();
cfg.copyFrom(info);
in.begin(cfg);
// Setup FFT
auto tcfg = fft.defaultConfig();
tcfg.copyFrom(info);
tcfg.length = 512;
tcfg.callback = &fftResult;
fft.begin(tcfg);
}
void loop() { copier.copy(); }

52
libraries/audio-tools/examples/tests/fft/fft-window/fft-window.ino Normal file
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#include "AudioTools.h"
#include "AudioTools/AudioLibs/AudioRealFFT.h" // using RealFFT
AudioRealFFT fft; // or AudioKissFFT
Hann hann;
BufferedWindow buffered(&hann);
SineWaveGenerator<int16_t> sineWave(32000);
GeneratedSoundStream<int16_t> in(sineWave);
StreamCopy copier(fft, in);
AudioInfo info(44100, 1, 16);
float value = 0;
// display fft result
void fftResult(AudioFFTBase &fft) {
float diff;
auto result = fft.result();
if (result.magnitude > 100) {
Serial.print(result.frequency);
Serial.print(" ");
Serial.print(result.magnitude);
Serial.print(" => ");
Serial.print(result.frequencyAsNote(diff));
Serial.print(" diff: ");
Serial.print(diff);
Serial.print(" - time ms ");
Serial.print(fft.resultTime() - fft.resultTimeBegin());
Serial.println();
}
}
void setup() {
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
// set the frequency
sineWave.setFrequency(N_B4);
// Setup sine wave
auto cfg = in.defaultConfig();
cfg.copyFrom(info);
in.begin(cfg);
// Setup FFT
auto tcfg = fft.defaultConfig();
tcfg.copyFrom(info);
tcfg.length = 4096;
tcfg.callback = &fftResult;
tcfg.window_function = &buffered;
fft.begin(tcfg);
}
void loop() { copier.copy(); }