message: AudioSDPlayer_F32: add SD_CONFIG to sd.begin
diff: #define STATE_STOP 13
  #define STATE_NOT_BEGUN 99
  +#define SD_CONFIG SdioConfig(FIFO_SDIO) //is this correct for both Teensy 3 and Teensy 4?
  unsigned long AudioSDPlayer_F32::update_counter = 0;
  @@ -58,7 +59,7 @@ void AudioSDPlayer_F32::init(void) {
  void AudioSDPlayer_F32::begin(void)
  {
  if (state == STATE_NOT_BEGUN) {
  - if (!(sd.begin())) {
  + if (!(sd.begin(SD_CONFIG))) {
  Serial.println("AudioPlaySdWAV_F32: cannot open SD.");
  return;
  }
  