MicroE-506 with AudioControlWM8731master Problem

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Svenson

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Hi guys, i'm trying to setup my new buy. MicroE-506 With Teensy 4.0 (or Teensy 3.2).
I'm having some problem with easy examples so probably there's something that I dont understand.

I'm trying to connect my poket operator (PO-16) in (mic-in jack) and my headpohones (in output jack) to make some real time effect.

If I connect just AudioInputI2S in a AudioOutputI2S everything seems to work and i can hear the sound in my headphones.
But if I use some effect like Filter or Delay I have problem.
if I use Filter -> I can hear just a strong white noise
if I use a Delay -> I can hear PO input but everything is distorted (like clipping)

I have follow wiring instruction in the WM8731MikroSine Example.

This the code of filter test

Code:
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>

// GUItool: begin automatically generated code
AudioInputI2S            i2s1;           //xy=99,60
AudioFilterBiquad        biquad1;        //xy=257,60
AudioOutputI2S           i2s2;           //xy=416,60
AudioConnection          patchCord1(i2s1, 0, biquad1, 0);
AudioConnection          patchCord2(biquad1, 0, i2s2, 0);
AudioConnection          patchCord3(biquad1, 0, i2s2, 1);
AudioControlWM8731master wm8731m1;       //xy=526.0104370117188,988.0103330612183
// GUItool: end automatically generated code


void setup() {
  

  delay(1000); // allow the WM7831 extra time to power up
  wm8731m1.enable();

  AudioMemory(15);

  wm8731m1.volume(0.50);
  wm8731m1.inputSelect(AUDIO_INPUT_MIC);
  // wm8731m1.inputSelect(AUDIO_INPUT_LINEIN); // not connected on MikroE-506


  
  // Butterworth filter, 12 db/octave
  biquad1.setLowpass(0, 1000, 0.707);

  // Linkwitz-Riley filter, 48 dB/octave
  //biquad1.setLowpass(0, 800, 0.54);
  //biquad1.setLowpass(1, 800, 1.3);
  //biquad1.setLowpass(2, 800, 0.54);
  //biquad1.setLowpass(3, 800, 1.3);
}


void loop() {
}



Can anyone help me.

Thank
Andrea
 
If you configure the WM8731 with AudioControlWM8731master, then you need to use AudioInputI2Sslave and/or AudioOutputI2Sslave to communicate with it.

Using AudioControlWM8731master together with AudioInputI2S & AudioOutputI2S will cause both Teensy and the WM8731 to attempt to drive BCLK and LRCLK. Not good...
 
If you configure the WM8731 with AudioControlWM8731master, then you need to use AudioInputI2Sslave and/or AudioOutputI2Sslave to communicate with it.

Using AudioControlWM8731master together with AudioInputI2S & AudioOutputI2S will cause both Teensy and the WM8731 to attempt to drive BCLK and LRCLK. Not good...

Ok, now it's working! :)

Thank you very much for your help.
 
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