soudsim bugfix

FFT_MajorPeak was just going from 0..255.
Now it simulates the full range from 21hz ... 8Khz

wled00/util.cpp

@@ -503,8 +503,8 @@ um_data_t* simulateSound(uint8_t simulationId)
   }
 
   samplePeak    = random8() > 250;
-  FFT_MajorPeak = volumeSmth;
-  maxVol        = 10;  // this gets feedback fro UI
+  FFT_MajorPeak = 21 + (volumeSmth*volumeSmth) / 8.0f; // walk thru full range of 21hz...8200hz
+  maxVol        = 31;  // this gets feedback fro UI
   binNum        = 8;   // this gets feedback fro UI
   volumeRaw = volumeSmth;
   my_magnitude = 10000.0 / 8.0f; //no idea if 10000 is a good value for FFT_Magnitude ???