message: IIR Filterbank: add debug println()s
diff: @@ -245,6 +245,7 @@ int AudioConfigIIRFilterBank_F32::iir_filterbank_sos(float *sos, int *d, float *
  //Serial.println(FreeRam());
  //design filterbank, zeros and poles and gains
  + Serial.println("AudioConfigIIRFilterBank_F32::iir_filterbank_sos: calling iirfb_zp()");
  int nz = n_iir; //the CHA code from BTNRH uses this notation
  iirfb_zp(z, //filter zeros. pointer to array float[64]
  p, //filter poles. pointer to array float[64]
  @@ -265,6 +266,7 @@ int AudioConfigIIRFilterBank_F32::iir_filterbank_sos(float *sos, int *d, float *
  #endif
  //adjust filter to time-align the peaks of the fiter response
  + Serial.println("AudioConfigIIRFilterBank_F32::iir_filterbank_sos: calling align_peak_fb()");
  align_peak_fb(z, //filter zeros. pointer to array float[64]
  p, //filter poles. pointer to array float[64]
  g, //gain for each filter. pointer to array float[8]
  @@ -303,6 +305,7 @@ int AudioConfigIIRFilterBank_F32::iir_filterbank_sos(float *sos, int *d, float *
  #endif
  //convert to second order sections
  + Serial.println("AudioConfigIIRFilterBank_F32::iir_filterbank_sos: converting to second order sections");
  float bk[3], ak[3]; //each biquad is 3 b coefficients and 3 a coefficients
  int out_ind ;
  int n_biquad = nz / 2;
  @@ -372,6 +375,7 @@ int AudioConfigIIRFilterBank_F32::iir_filterbank_sos(float *sos, int *d, float *
  //}
  //release the allocated memory
  + Serial.println("AudioConfigIIRFilterBank_F32::iir_filterbank_sos: calling freeing memory");
  free(g);
  free(p);
  free(z);
  