For the hunters on the East Coast looking for audio specific to the very birds that they are hunting this pack is for you. These tracks are comprised of recordings from greater snows at the highest quality. With a great mixture of both feeding and barking birds these tracks are truly a unique all in one package for hunting Greater Snows. No background "roar" is present at high volumes when running it on your caller. The Greater Snows track offers two channel audio with birds barking back and forth at each other while Eastern Greaters is a monotone track allowing highly realistic audio across all speakers at the same time.