Don't get me wrong, it's cool technology but there's quite a delay between the tap and the xylophone playing. The twinkle-twinkle video demo cleverly gets aroun

Don't get me wrong, it's cool technology but there's quite a delay between the tap and the xylophone playing. The twinkle-twinkle video demo cleverly gets around this by playing the tune at a tempo that matches the delay. Sneaky.