         matrix.fillScreen(black);
 
         for (int i = 0; i < 16; i++) {
-            // Serial.print(level[i]);
-
             // TODO: conversion from FFT data to display bars should be
-            // exponentially scaled.  But how keep it a simple example?
+            // exponentially scaled.  But how to keep it a simple example?
             int val = level[i] * scale;
 
             // trim the bars vertically to fill the matrix height


    // Audio requires memory to work.
    AudioMemory(12);

    //Serial.println(F("Started"));
}

void loop()

// looks more pleasing to corresponds to human sound perception.
int   shown[16];

const rgb24 black = CRGB(0, 0, 0);
const rgb24 red = CRGB(255, 0, 0);

byte status = 0;

void setup()
{
    Serial.begin(9600);

    // Initialize 32x32 LED Matrix
    matrix.begin();
