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Microphone calibration profiles

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This commit is contained in:
Frank
2022-10-05 17:55:54 +02:00
parent 698a6c8f89
commit 5ed0bb8c2b
2 changed files with 54 additions and 15 deletions
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67
usermods/audioreactive/audio_reactive.h
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@@ -155,21 +155,54 @@ static uint64_t sampleTime = 0;
#endif
// Table of multiplication factors so that we can even out the frequency response.
#define MAX_PINK 5 // 0 = standard, 1= line-in (pink moise only), 2..3 = IMNP441, 4 = ICS-43434, 5 = flat (no pink noise adjustment)
#define MAX_PINK 9 // 0 = standard, 1= line-in (pink moise only), 2..4 = IMNP441, 5..6 = ICS-43434, 6..7 = userdef, 9= flat (no pink noise adjustment)
static const float fftResultPink[MAX_PINK+1][NUM_GEQ_CHANNELS] = {
{ 1.70f, 1.71f, 1.73f, 1.78f, 1.68f, 1.56f, 1.55f, 1.63f, 1.79f, 1.62f, 1.80f, 2.06f, 2.47f, 3.35f, 6.83f, 9.55f }, // default from SR WLED
{ 1.30f, 1.32f, 1.40f, 1.46f, 1.52f, 1.57f, 1.68f, 1.80f, 1.89f, 2.00f, 2.11f, 2.21f, 2.30f, 2.39f, 3.09f, 4.34f }, // pink noise adjustment only. Good for line-in without microphone distortion
{ 1.30f, 1.32f, 1.40f, 1.46f, 1.52f, 1.57f, 1.68f, 1.80f, 1.89f, 2.00f, 2.11f, 2.21f, 2.30f, 2.39f, 3.09f, 4.34f }, // Line-In - pink noise adjustment only, without microphone distortion
{ 1.82f, 1.72f, 1.70f, 1.50f, 1.52f, 1.57f, 1.68f, 1.80f, 1.89f, 2.00f, 2.11f, 2.21f, 2.30f, 2.90f, 3.86f, 6.29f }, // IMNP441 datasheet response profile * pink noise
//disabled, because not much different from "IMNP441 datasheet"
//{ 12.0f, 6.60f, 2.60f, 1.15f, 1.35f, 2.05f, 2.85f, 2.50f, 2.85f, 3.30f, 2.25f, 4.35f, 3.80f, 3.75f, 6.50f, 9.00f }, // IMNP441 - voice, or small speaker
{ 1.82f, 1.72f, 1.70f, 1.50f, 1.52f, 1.57f, 1.68f, 1.80f, 1.89f, 2.00f, 2.11f, 2.21f, 2.30f, 2.90f, 3.86f, 6.29f}, // IMNP441 datasheet response profile * pink noise
{ 2.80f, 2.20f, 1.30f, 1.15f, 1.55f, 2.45f, 4.20f, 2.80f, 3.20f, 3.60f, 4.20f, 4.90f, 5.70f, 6.05f,10.50f,14.85f}, // IMNP441 - big speaker, strong bass
// next one has not much visual differece compared to default IMNP441 profile
{ 12.0f, 6.60f, 2.60f, 1.15f, 1.35f, 2.05f, 2.85f, 2.50f, 2.85f, 3.30f, 2.25f, 4.35f, 3.80f, 3.75f, 6.50f, 9.00f}, // IMNP441 - voice, or small speaker
{ 2.34f, 1.60f, 1.40f, 1.46f, 1.52f, 1.57f, 1.68f, 1.80f, 1.89f, 2.00f, 2.11f, 2.21f, 2.30f, 2.15f, 2.55f, 2.90f }, // ICS-43434 datasheet response * pink noise
{ 2.75f, 1.60f, 1.40f, 1.46f, 1.52f, 1.57f, 1.68f, 1.80f, 1.89f, 2.00f, 2.11f, 2.21f, 2.30f, 1.75f, 2.55f, 3.60f }, // ICS-43434 datasheet response * pink noise
{ 2.25f, 1.20f, 1.00f, 1.20f, 1.80f, 3.20f, 3.06f, 2.50f, 2.85f, 2.80f, 3.10f, 3.25f, 3.15f, 2.40f, 2.80f, 3.20f }, // ICS-43434 - big speaker, strong bass
{ 2.38f, 2.18f, 2.07f, 1.70f, 1.70f, 1.70f, 1.70f, 1.70f, 1.70f, 1.70f, 1.70f, 1.70f, 2.07f, 1.70f, 2.13f, 2.47f } // FLAT (IMNP441)
{ 2.25f, 1.60f, 1.30f, 1.60f, 2.20f, 3.20f, 3.06f, 2.60f, 2.85f, 3.50f, 3.90f, 4.50f, 3.35f, 3.20f, 3.60f, 4.20f }, // ICS-43434 - userdef #1 for ewowi (enhance median freqs)
{ 4.75f, 3.60f, 2.40f, 2.46f, 3.52f, 1.60f, 1.68f, 3.20f, 2.20f, 2.00f, 2.30f, 2.41f, 2.30f, 1.25f, 4.55f, 6.50f }, // ICS-43434 - userdef #2 for softhack (mic hidden inside mini-shield)
{ 2.38f, 2.18f, 2.07f, 1.70f, 1.70f, 1.70f, 1.70f, 1.70f, 1.70f, 1.70f, 1.70f, 1.70f, 1.95f, 1.70f, 2.13f, 2.47f } // almost FLAT (IMNP441 but no PINK noise adjustments)
};
/* how to make your own profile:
* ===============================
* preparation: make sure your microphone has direct line-of-sigh with the speaker, 1-2meter distance is best
* Prepare your HiFi equipment: disable all "Sound enhancements" - like Loudness, Equalizer, Bass Boost. Bass/Trebble controls set to middle.
* Your HiFi equipment should receive its audio input from Line-In, SPDIF, HDMI, or another "undistorted" connection (like CDROM).
* Try not to use Bluetooth or MP3 when playing the "pink noise" audio. BT-audio and MP3 both perform "acoustic adjustments" that we don't want now.
* SR WLED: enable AGC ("standard" or "lazy"), set squelch to a low level, check that LEDs don't reacts in silence.
* SR WLED: select "Generic Line-In" as your Frequency Profile, "Linear" or "Square Root" as Frequency Scale
* SR WLED: Dynamic Limiter On, Dynamics Fall Time around 4200 - makes GEQ hold peaks for much longer
* SR WLED: Select GEQ effect, move all effect slider to max (i.e. right side)
* Measure: play Pink Noise for 2-3 minutes - for examples from youtube https://www.youtube.com/watch?v=ZXtimhT-ff4
* Measure: Take a Photo. Make sure that LEDs for each "bar" are well visible (ou need to count them later)
* Your own profile:
* - Target for each LED bar is 50% to 75% of the max height --> 8(high) x 16(wide) panel means target = 5. 32 x 16 means target = 22.
* - From left to right - count the LEDs in each of the 16 frequency colums (that's why you need the photo). This is the barheight for each channel.
* - math time! Find the multiplier that will bring each bar to to target.
* * in case of square root scale: multiplier = (target * target) / (barheight * barheight)
* * in case of linear scale: multiplier = target / barheight
*
* - start with a copy of the parameter line "Line-In"
* - go through your new parameter line, multiply each entry with the mutliplier you found for that column.
* Compile + upload
* Test your new profile (same procedure as above). Iterate the process to improve results.
*/
// Create FFT object
#ifdef UM_AUDIOREACTIVE_USE_NEW_FFT
static ArduinoFFT<float> FFT = ArduinoFFT<float>( vReal, vImag, samplesFFT, SAMPLE_RATE, windowWeighingFactors);
@@ -566,7 +599,7 @@ class AudioReactive : public Usermod {
// variables used by getSample() and agcAvg()
int16_t micIn = 0; // Current sample starts with negative values and large values, which is why it's 16 bit signed
double sampleMax = 0.0; // Max sample over a few seconds. Needed for AGC controler.
float micLev = 0.0f; // Used to convert returned value to have '0' as minimum. A leveller
double micLev = 0.0f; // Used to convert returned value to have '0' as minimum. A leveller
float expAdjF = 0.0f; // Used for exponential filter.
float sampleReal = 0.0f; // "sampleRaw" as float, to provide bits that are lost otherwise (before amplification by sampleGain or inputLevel). Needed for AGC.
int16_t sampleRaw = 0; // Current sample. Must only be updated ONCE!!! (amplified mic value by sampleGain and inputLevel)
@@ -796,7 +829,8 @@ class AudioReactive : public Usermod {
#endif
#endif
micLev = ((micLev * 8191.0f) + micDataReal) / 8192.0f; // takes a few seconds to "catch up" with the Mic Input
//micLev = ((micLev * 8191.0f) + micDataReal) / 8192.0f; // takes a few seconds to "catch up" with the Mic Input
micLev += (micDataReal-micLev) / 12288.0f;
if(micIn < micLev) micLev = ((micLev * 31.0f) + micDataReal) / 32.0f; // align MicLev to lowest input signal
micIn -= micLev; // Let's center it to 0 now
@@ -1647,13 +1681,16 @@ class AudioReactive : public Usermod {
oappend(SET_F("addOption(dd,'Logarithmic (Loudness)',1);"));
oappend(SET_F("dd=addDropdown('AudioReactive','Frequency:Profile');"));
oappend(SET_F("addOption(dd,'Standard',0);"));
oappend(SET_F("addOption(dd,'Line-In',1);"));
oappend(SET_F("addOption(dd,'Generic Microphone',0);"));
oappend(SET_F("addOption(dd,'Generic Line-In',1);"));
oappend(SET_F("addOption(dd,'IMNP441',2);"));
//oappend(SET_F("addOption(dd,'IMNP441 (small speaker)',3);"));
oappend(SET_F("addOption(dd,'IMNP441 (big speaker)',3);"));
oappend(SET_F("addOption(dd,'ICS-43434',4);"));
oappend(SET_F("addOption(dd,'flat',5);"));
oappend(SET_F("addOption(dd,'IMNP441 - big speakers',3);"));
oappend(SET_F("addOption(dd,'IMNP441 - small speakers',4);"));
oappend(SET_F("addOption(dd,'ICS-43434',5);"));
oappend(SET_F("addOption(dd,'ICS-43434 - big speakers',6);"));
oappend(SET_F("addOption(dd,'ICS-43434 - userdef #1',7);"));
oappend(SET_F("addOption(dd,'ICS-43434 - userdef #2',8);"));
oappend(SET_F("addOption(dd,'flat - no adjustments',9);"));
oappend(SET_F("dd=addDropdown('AudioReactive','sync:mode');"));
oappend(SET_F("addOption(dd,'Off',0);"));

2
usermods/audioreactive/audio_source.h
View File

@@ -288,6 +288,8 @@ class I2SSource : public AudioSource {
currSample = (float) newSamples[i]; // 16bit input -> use as-is
#endif
buffer[i] = currSample;
//buffer[i] *= 0.6f; // (ICS-43434): compensate for higher sensitivity (reduce by 2db)
}
}
}