message: Example: trial update for BasicGain_wApp for V7 firmware
diff: //here are the libraries that we need
  #include <Tympan_Library.h> //include the Tympan Library
  +//set to true for Rev E (and set the Arduino IDE to Teensy 4.1).
  +#define USE_REV_E (false) //this also assumes that REV_E is BC127 firmware V7 whereas REV_D is assumed to be V5
  +
  //create audio library objects for handling the audio
  +#if (USE_REV_E)
  +Tympan myTympan(TympanRev::E); //do TympanRev::D or TympanRev::C
  +#else
  Tympan myTympan(TympanRev::D); //do TympanRev::D or TympanRev::C
  +#endif
  AudioInputI2S_F32 i2s_in; //Digital audio *from* the Tympan AIC.
  AudioEffectGain_F32 gain1, gain2; //Applies digital gain to audio data.
  AudioOutputI2S_F32 i2s_out; //Digital audio *to* the Tympan AIC. Always list last to minimize latency
  @@ -62,7 +69,14 @@ void setup() {
  //setup BLE
  while (Serial1.available()) Serial1.read(); //clear the incoming Serial1 (BT) buffer
  + #if USE_REV_E
  + //V7 firmware (ie, RevE)
  + ble.advertise(true);
  + #else
  + //V5 firmware (ie, RevD)
  + ble.set_BC127_firmware_ver(5);
  ble.setupBLE(myTympan);
  + #endif
  //Create the GUI description (but not yet transmitted to the App...that's after it connects)
  createTympanRemoteLayout();
  