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audio mic logger improvement

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added min/max of raw samples to the plot.
This will help for debugging microphones with strong negative DC offset.
This commit is contained in:
Frank
2022-12-19 16:29:49 +01:00
parent 3139f5228d
commit 465c032535
1 changed files with 47 additions and 1 deletions
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48
usermods/audioreactive/audio_reactive.h
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@@ -58,10 +58,12 @@
#define PLOT_PRINT(x) DEBUGOUT.print(x)
#define PLOT_PRINTLN(x) DEBUGOUT.println(x)
#define PLOT_PRINTF(x...) DEBUGOUT.printf(x)
#define PLOT_FLUSH() DEBUGOUT.flush()
#else
#define PLOT_PRINT(x)
#define PLOT_PRINTLN(x)
#define PLOT_PRINTF(x...)
#define PLOT_FLUSH()
#endif
// use audio source class (ESP32 specific)
@@ -141,6 +143,15 @@ static unsigned long timeOfPeak = 0; // time of last sample peak detection.
static void detectSamplePeak(void); // peak detection function (needs scaled FFT reasults in vReal[])
static void autoResetPeak(void); // peak auto-reset function
// shared vars for debugging
#ifdef MIC_LOGGER
static volatile float micReal_min = 0.0f; // MicIn data min from last batch of samples
static volatile float micReal_max = 0.0f; // MicIn data max from last batch of samples
#if 0
static volatile float micReal_min2 = 0.0f; // MicIn data min from last batch of samples
static volatile float micReal_max2 = 0.0f; // MicIn data max from last batch of samples
#endif
#endif
////////////////////
// Begin FFT Code //
@@ -331,6 +342,19 @@ void FFTcode(void * parameter)
xLastWakeTime = xTaskGetTickCount(); // update "last unblocked time" for vTaskDelay
#ifdef MIC_LOGGER
float datMin = 0.0f;
float datMax = 0.0f;
for (int i=0; i < samplesFFT; i++) {
if (i==0) {
datMin = datMax = vReal[i];
} else {
if (datMin > vReal[i]) datMin = vReal[i];
if (datMax < vReal[i]) datMax = vReal[i];
}
}
#endif
// band pass filter - can reduce noise floor by a factor of 50
// downside: frequencies below 100Hz will be ignored
if (useBandPassFilter) runMicFilter(samplesFFT, vReal);
@@ -347,7 +371,23 @@ void FFTcode(void * parameter)
// release highest sample to volume reactive effects early - not strictly necessary here - could also be done at the end of the function
// early release allows the filters (getSample() and agcAvg()) to work with fresh values - we will have matching gain and noise gate values when we want to process the FFT results.
micDataReal = maxSample;
#ifdef MIC_LOGGER
micReal_min = datMin;
micReal_max = datMax;
#if 0
// compute mix/max again after filering - usefull for filter debugging
for (int i=0; i < samplesFFT; i++) {
if (i==0) {
datMin = datMax = vReal[i];
} else {
if (datMin > vReal[i]) datMin = vReal[i];
if (datMax < vReal[i]) datMax = vReal[i];
}
}
micReal_min2 = datMin;
micReal_max2 = datMax;
#endif
#endif
// run FFT (takes 3-5ms on ESP32)
//if (fabsf(sampleAvg) > 0.25f) { // noise gate open
if (fabsf(volumeSmth) > 0.25f) { // noise gate open
@@ -772,10 +812,15 @@ class AudioReactive : public Usermod {
if (disableSoundProcessing && (!udpSyncConnected || ((audioSyncEnabled & 0x02) == 0))) return; // no audio availeable
#ifdef MIC_LOGGER
// Debugging functions for audio input and sound processing. Comment out the values you want to see
PLOT_PRINT("micMin:"); PLOT_PRINT(micReal_min); PLOT_PRINT("\t");
PLOT_PRINT("micMax:"); PLOT_PRINT(micReal_max); PLOT_PRINT("\t");
//PLOT_PRINT("micDC:"); PLOT_PRINT((micReal_min + micReal_max)/2.0f);PLOT_PRINT("\t");
PLOT_PRINT("micReal:"); PLOT_PRINT(micDataReal); PLOT_PRINT("\t");
PLOT_PRINT("volumeSmth:"); PLOT_PRINT(volumeSmth); PLOT_PRINT("\t");
//PLOT_PRINT("volumeRaw:"); PLOT_PRINT(volumeRaw); PLOT_PRINT("\t");
PLOT_PRINT("DC_Level:"); PLOT_PRINT(micLev); PLOT_PRINT("\t");
// //PLOT_PRINT("filtmicMin:"); PLOT_PRINT(micReal_min2); PLOT_PRINT("\t");
// //PLOT_PRINT("filtmicMax:"); PLOT_PRINT(micReal_max2); PLOT_PRINT("\t");
//PLOT_PRINT("sampleAgc:"); PLOT_PRINT(sampleAgc); PLOT_PRINT("\t");
//PLOT_PRINT("sampleAvg:"); PLOT_PRINT(sampleAvg); PLOT_PRINT("\t");
//PLOT_PRINT("sampleReal:"); PLOT_PRINT(sampleReal); PLOT_PRINT("\t");
@@ -785,6 +830,7 @@ class AudioReactive : public Usermod {
//PLOT_PRINT("samplePeak:"); PLOT_PRINT((samplePeak!=0) ? 128:0); PLOT_PRINT("\t");
//PLOT_PRINT("multAgc:"); PLOT_PRINT(multAgc, 4); PLOT_PRINT("\t");
PLOT_PRINTLN();
PLOT_FLUSH();
#endif
#ifdef FFT_SAMPLING_LOG