   if(ASI <= MUTE_AUDIO_UNDER_IAS) {
 #ifdef SHOW_SERIAL_DEBUG    
   // show audio muted and debug info.
-  sprintf(tempBuf, "AUDIO MUTED: Airspeed to low. Min:%i ASI:%i",MUTE_AUDIO_UNDER_IAS, ASI);
-  Serial.println(tempBuf);
+  //sprintf(tempBuf, "AUDIO MUTED: Airspeed to low. Min:%i ASI:%i",MUTE_AUDIO_UNDER_IAS, ASI);
+  //Serial.println(tempBuf);
   toneMode = TONE_OFF;
   return;
 #endif

#define DYNON_SERIAL_LEN              53
#define DYNON_SKYVIEW_SERIAL_LEN      74

// AOA values & Tone Pulse Per Sec (PPS) 
#define HIGH_TONE_STALL_PPS   20      // how many PPS to play during stall
#define HIGH_TONE_AOA_STALL   90      // % (and above) where stall happens.
#define HIGH_TONE_AOA_START   70      // % (and above) where high tone starts
#define HIGH_TONE_PPS_MAX     6.5     // 6.5   
#define HIGH_TONE_PPS_MIN     1.5     // 1.5
#define HIGH_TONE_HZ          1600    // freq of high tone
//#define HIGH_TONE2_HZ         1500    // a 2nd high tone that it will cycle between (if defined)

#define LOW_TONE_AOA_SOLID    60      // % (and above) where a solid low tone is played.
#define LOW_TONE_AOA_START    20      // % (and above) where low 
#define LOW_TONE_PPS_MAX      8.5
#define LOW_TONE_PPS_MIN      1.5
#define LOW_TONE_HZ           400     // freq of low tone

#define TONE_PIN              2     // TIOA0
#define PIN_LED1              13    // internal LED for showing AOA status.

  } else if(AOA >= HIGH_TONE_AOA_START) {
    // play HIGH tone at Pulse Rate 1.5 PPS to 6.2 PPS (depending on AOA value)
    highTone = true;
    OldValue = AOA-(HIGH_TONE_AOA_START-1);
    toneMode = PULSE_TONE;
    // scale number using this. http://stackoverflow.com/questions/929103/convert-a-number-range-to-another-range-maintaining-ratio
    OldRange = 20 - 1;  //(OldMax - OldMin)  
