message: NBand_Stereo: add comment about RevE only and defaults to Android only
diff: If you want more than 16 channels, that'll take a bit more effort. Ask the
  question in the Tympan forum!
  + TYMPAN REV E ONLY! Please be aware that this example defaults to 16 channels per ear.
  + As a result, this requires the processing power of the Tympan RevE. If you want to
  + run this example on a Tympan RevD, you will have to reduce the number of channels
  + (maybe down to 6-8 channels per ear?).
  +
  + DEFAULT IS ANDROID ONLY! Please be aware that, because there are so many
  + parameter values being excanged with the mobile App, we have switched to a
  + higher speed communication mode. This only seems to work with Anrdoid and
  + seems to fail with iOS (Apple). If you want to run with an iOS device, you
  + simply need to comment out one line of code here in this file. Comment out:
  + ble.setUseFasterBaudRateUponBegin(true);
  +
  MIT License. use at your own risk.
  */
  @@ -160,9 +172,6 @@ void setup() {
  audioSDWriter.setNumWriteChannels(4); //can record 2 or 4 channels
  Serial.println("Setup: SD configured for writing " + String(audioSDWriter.getNumWriteChannels()) + " audio channels.");
  - //update the potentiometer settings
  - //if (USE_VOLUME_KNOB) servicePotentiometer(millis()); //see code later in this file
  -
  //enable the algorithms...but is this really needed?
  multiBandWDRC[0].filterbank.enable(true);
  multiBandWDRC[1].filterbank.enable(true);
  