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Merge pull request #4690 from Arcitec/ar-agc-control

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AR: add compile-time flag for "Automatic Gain Control" option
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netmindz 2025-06-14 21:17:01 +01:00 committed by GitHub
commit d2d5c423b7
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2 changed files with 6 additions and 2 deletions
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5
usermods/audioreactive/audio_reactive.cpp
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@ -65,11 +65,14 @@ static bool udpSyncConnected = false; // UDP connection status -> true i
// audioreactive variables
#ifdef ARDUINO_ARCH_ESP32
#ifndef SR_AGC // Automatic gain control mode
#define SR_AGC 0 // default mode = off
#endif
static float micDataReal = 0.0f; // MicIn data with full 24bit resolution - lowest 8bit after decimal point
static float multAgc = 1.0f; // sample * multAgc = sampleAgc. Our AGC multiplier
static float sampleAvg = 0.0f; // Smoothed Average sample - sampleAvg < 1 means "quiet" (simple noise gate)
static float sampleAgc = 0.0f; // Smoothed AGC sample
static uint8_t soundAgc = 0; // Automagic gain control: 0 - none, 1 - normal, 2 - vivid, 3 - lazy (config value)
static uint8_t soundAgc = SR_AGC; // Automatic gain control: 0 - off, 1 - normal, 2 - vivid, 3 - lazy (config value)
#endif
//static float volumeSmth = 0.0f; // either sampleAvg or sampleAgc depending on soundAgc; smoothed sample
static float FFT_MajorPeak = 1.0f; // FFT: strongest (peak) frequency

3
usermods/audioreactive/readme.md
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@ -60,8 +60,9 @@ You can use the following additional flags in your `build_flags`
* `-D SR_SQUELCH=x` : Default "squelch" setting (10)
* `-D SR_GAIN=x` : Default "gain" setting (60)
* `-D SR_AGC=x` : (Only ESP32) Default "AGC (Automatic Gain Control)" setting (0): 0=off, 1=normal, 2=vivid, 3=lazy
* `-D I2S_USE_RIGHT_CHANNEL`: Use RIGHT instead of LEFT channel (not recommended unless you strictly need this).
* `-D I2S_USE_16BIT_SAMPLES`: Use 16bit instead of 32bit for internal sample buffers. Reduces sampling quality, but frees some RAM ressources (not recommended unless you absolutely need this).
* `-D I2S_USE_16BIT_SAMPLES`: Use 16bit instead of 32bit for internal sample buffers. Reduces sampling quality, but frees some RAM resources (not recommended unless you absolutely need this).
* `-D I2S_GRAB_ADC1_COMPLETELY`: Experimental: continuously sample analog ADC microphone. Only effective on ESP32. WARNING this *will* cause conflicts(lock-up) with any analogRead() call.
* `-D MIC_LOGGER` : (debugging) Logs samples from the microphone to serial USB. Use with serial plotter (Arduino IDE)
* `-D SR_DEBUG` : (debugging) Additional error diagnostics and debug info on serial USB.