 // looks more pleasing to corresponds to human sound perception.
 int   shown[16];
 
-rgb24 black = CRGB(0, 0, 0);
-rgb24 red = CRGB(255, 0, 0);
+const rgb24 black = CRGB(0, 0, 0);
+const rgb24 red = CRGB(255, 0, 0);
 
 byte status = 0;
 
 void setup()
 {
     Serial.begin(9600);
-    //delay(1000);
-
-    //Serial.println(F("Starting..."));
 
     // Initialize 32x32 LED Matrix
     matrix.begin();

                if (shown[i] > 0) shown[i] = shown[i] - 1;
                val = shown[i];
            }

            //Serial.print(shown[i]);
            //Serial.print(" ");

            // color based on level
            // rgb24 color = CRGB(CHSV(val * 8, 255, 255));

            // color based on band
            rgb24 color = CRGB(CHSV(i * 15, 255, 255));


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

void loop()
