message: SampelRate: Adding link to post on setting frac and div
diff: //Here's the function to change the sample rate of the system (via changing the clocking of the I2S bus)
  //https://forum.pjrc.com/threads/38753-Discussion-about-a-simple-way-to-change-the-sample-rate?p=121365&viewfull=1#post121365
  +//
  +//And, a post on how to compute the frac and div portions? I haven't checked the code presented in this post:
  +//https://forum.pjrc.com/threads/38753-Discussion-about-a-simple-way-to-change-the-sample-rate?p=188812&viewfull=1#post188812
  float setI2SFreq(const float freq_Hz) {
  int freq = (int)freq_Hz;
  typedef struct {
  