                 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));

        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?
            int val = level[i] * scale;

            // trim the bars vertically to fill the matrix height


        matrix.swapBuffers();

        FastLED.countFPS();
    }
}
