oh sorry I think I posted reply to wrong thread

#include "esp_system.h" #include "es8388.h" main() { // sets ADC input gain 0 = 0db lineIn es8388_set_mic_gain(0); } If theres something you need that's not in es8388.c then write the registers over I2C by following datasheet. see how the functions are writing registers to the codec in es8388.c and ...

Awsome if you want to share your EQ code later !
would love to see how it's working.

fixed the buzzing ( was samples out of range +1 -1 float ) I (443) EQUALIZER: Impulse response of IIR filter with F=0.250000, qFactor=4.000000 I (453) view: Data min[2] = -1.535849, Data max[0] = 1.975187 ________________________________________________________________ 0xxx | 1xxxxx | 2xxxxxxx | 3xx...

did a test bypassing DSP int16 --> float --> int16 and its stereo again.

you are correct , ESP32 has no problem with that conversion.

so something strange happening to the samples in the DSP library making the samples mono and a small buzzing !

will post here if I can find out why.

Interesting, so I could just do the biquad eq in C maybe. How come your using inline double in your example rather than float? Inline double is a 64bit float? I should take a look at how the 10 band eq in eualizer.c is actually working!! It's probebly exactly that 😂 Equalizer.c is limited to - 13db ...

working :D :D :D int16 samples --> float --> DSP --> float --> int16 samples I'll check if I can use the ESP-DSP lib maths functions to see if I can translate the int16 samples to and from float. The main problem apart from converting the samples to float and back was my IIR coefficients i'd generat...

Thanks for the offer of the EQ code , not sure I have the coding ability to convert PC code to ESP32 ! might come back here asking for it if I fail to figure out how to just use the IDF-DSP lib. your right , the codec 'ES8388' on lyrat 4.3 is max 24-bit 96 kHz sampling frequency ( in fact 96khz is'n...

It looks like I got your hacked equalizer.c code working but maybe in a lightly different way. audio_element_handle_t Dsp_init() // no equalizer array to pass in ! { audio_element_cfg_t DspCfg; // = DEFAULT_AUDIO_ELEMENT_CONFIG(); memset(&DspCfg, 0, sizeof(audio_element_cfg_t)); DspCfg.destroy = Dsp...

Hi shabtronic! Thanks for this ! You saved me hours of head scratching and have done exactly what I thought I needed to do! Did you just add your additional dsp functions etc to the equalizer.c or did you make a new file dspProcess.c and a dspProcess.h header? I'll try and insert my code to your Dsp...