A small example for using the Sparkfun Spectrum Shield together with two Adafruit Neopixel Strips.

StereoVU

#include <Adafruit_NeoPixel.h>

#define PIN_NEOPIXELS 7
#define PIN_STROBE 4
#define PIN_RESET 5
#define PIN_LEFT 0 //analog
#define PIN_RIGHT 1 //analog
 
#define NUMLEDSPERSEGMENT 8
#define NUMLEDS NUMLEDSPERSEGMENT * 2

#define MINPOWER 128
#define MAXPOWER 1023

Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUMLEDS, PIN_NEOPIXELS, NEO_GRB + NEO_KHZ800);

//band arrays
int left[7]; 
int right[7];

void setup() {
	//initialize neopixels
	strip.begin();
	strip.setBrightness(32); //otherwise I'll become blind during testing ... ;)
	strip.show();

	//initialize eq
	pinMode(PIN_RESET, OUTPUT); // reset
	pinMode(PIN_STROBE, OUTPUT); // strobe
	digitalWrite(PIN_RESET,LOW); // reset low
	digitalWrite(PIN_STROBE,HIGH); //pin 5 is RESET on the shield
}

void loop() {
	readMSGEQ7();

	int rLeft = colorValue((left[0]+left[1])/2);
	int gLeft = colorValue((left[2]/2+left[3]+left[4]/2)/2);
	int bLeft = colorValue((left[5]+left[6])/2);

	int rRight = colorValue((right[0]+right[1])/2);
	int gRight = colorValue((right[2]/2+right[3]+right[4]/2)/2);
	int bRight = colorValue((right[5]+right[6])/2);

	for (int i = 0; i < NUMLEDSPERSEGMENT; i++) {
		strip.setPixelColor(i, (i<=rLeft) ? 255 : 0,(i<=gLeft) ? 255 : 0,(i<=bLeft) ? 255 : 0);	
		strip.setPixelColor(i + NUMLEDSPERSEGMENT, (i<=rRight) ? 255 : 0,(i<=gRight) ? 255 : 0,(i<=bRight) ? 255 : 0);	
	}

	strip.show();

	delay(40);
}

int colorValue(int powerValue) 
{
	return map(powerValue, MINPOWER, MAXPOWER, 0, NUMLEDSPERSEGMENT);
}

void readMSGEQ7()
{
	//reset the data
	digitalWrite(PIN_RESET, HIGH);
	digitalWrite(PIN_RESET, LOW);
	
	//loop thru all 7 bands
	for(int band=0; band < 7; band++) {
		digitalWrite(PIN_STROBE,LOW); // go to the next band 
		delayMicroseconds(50); //gather some data
		left[band] = analogRead(PIN_LEFT); // store left band reading
		right[band] = analogRead(PIN_RIGHT); // store right band reading
		digitalWrite(PIN_STROBE,HIGH); // reset the strobe pin
	}
}