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audio processing: MicLevel "FAST freeze mode"

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This mode freezes MicLev even fast. However it makes some assumptions that may not always be true:
* At least 12 seconds of silence during start
* a high quality microphone with very low noise level.
--> If you are not sure about these preconditions, better use normal "Freeze" mode.
This commit is contained in:
Frank
2023-03-20 22:16:35 +01:00
parent fc9f3a1c24
commit 87069ef7c0
1 changed files with 16 additions and 6 deletions
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22
usermods/audioreactive/audio_reactive.h
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@@ -1107,6 +1107,7 @@ class AudioReactive : public Usermod {
static bool isFrozen = false;
static bool haveSilence = true;
static unsigned long lastSoundTime = 0; // for delaying un-freeze
static unsigned long startuptime = 0; // "fast freeze" mode: do not interfere during first 12 seconds (filter startup time)
#ifdef WLED_DISABLE_SOUND
micIn = inoise8(millis(), millis()); // Simulated analog read
@@ -1129,13 +1130,14 @@ class AudioReactive : public Usermod {
#endif
#endif
if ((micLevelMethod < 1) || !isFrozen) {
if (startuptime == 0) startuptime = millis(); // fast freeze mode - remember filter startup time
if ((micLevelMethod < 1) || !isFrozen) { // following the input level, UNLESS mic Level was frozen
micLev += (micDataReal-micLev) / 12288.0f;
}
if(micIn < micLev) {
micLev = ((micLev * 31.0f) + micDataReal) / 32.0f; // align MicLev to lowest input signal
if (!haveSilence) isFrozen = true;
if(micDataReal < (micLev-0.24)) { // MicLev above input signal:
micLev = ((micLev * 31.0f) + micDataReal) / 32.0f; // always align MicLev to lowest input signal
if (!haveSilence) isFrozen = true; // freeze mode: freeze micLevel so it cannot rise again
}
micIn -= micLev; // Let's center it to 0 now
@@ -1149,6 +1151,9 @@ class AudioReactive : public Usermod {
expAdjF = fabsf(expAdjF); // Now (!) take the absolute value
if ((micLevelMethod == 2) && !haveSilence && (expAdjF >= (1.5f * float(soundSquelch))))
isFrozen = true; // fast freeze mode: freeze micLevel once the volume rises 50% above squelch
//expAdjF = (micInNoDC <= soundSquelch) ? 0: expAdjF; // simple noise gate - experimental
expAdjF = (expAdjF <= soundSquelch) ? 0: expAdjF; // simple noise gate
if ((soundSquelch == 0) && (expAdjF < 0.25f)) expAdjF = 0; // do something meaningfull when "squelch = 0"
@@ -1159,8 +1164,12 @@ class AudioReactive : public Usermod {
lastSoundTime = millis();
haveSilence = false;
}
// un-freeze after 8 sec of silence
if (isFrozen && ((millis() - lastSoundTime) > 8000)) isFrozen = false;
// un-freeze micLev
if (micLevelMethod == 0) isFrozen = false;
if ((micLevelMethod == 1) && isFrozen && haveSilence && ((millis() - lastSoundTime) > 4000)) isFrozen = false; // normal freeze: 4 seconds silence needed
if ((micLevelMethod == 2) && isFrozen && haveSilence && ((millis() - lastSoundTime) > 6000)) isFrozen = false; // fast freeze: 6 seconds silence needed
if ((micLevelMethod == 2) && (millis() - startuptime < 12000)) isFrozen = false; // fast freeze: no freeze in first 12 seconds (filter startup phase)
tmpSample = expAdjF;
micIn = abs(micIn); // And get the absolute value of each sample
@@ -2186,6 +2195,7 @@ class AudioReactive : public Usermod {
oappend(SET_F("dd=addDropdown('AudioReactive','experiments:micLev');"));
oappend(SET_F("addOption(dd,'Floating (⎌)',0);"));
oappend(SET_F("addOption(dd,'Freeze',1);"));
oappend(SET_F("addOption(dd,'Fast Freeze',2);"));
oappend(SET_F("dd=addDropdown('AudioReactive','experiments:freqDist');"));
oappend(SET_F("addOption(dd,'Normal (⎌)',0);"));
oappend(SET_F("addOption(dd,'RightShift',1);"));