For a number of reasons, instrumental tunes rarely crack – let alone top – the pop music charts. And it has long been so. Though there have been exceptions both excellent (Edgar Winter‘s “Frankenstein,” Focus‘ “Hocus Pocus,” Marvin Hamlisch‘s “The Entertainer”), soporific (Vangelis‘ “Chariots of Fire”) and downright execrable (Frank Mills‘ “Music Box Dancer,” which