[xqudpzgd] Binary chiming clock

Instead of chiming the hour in unary, create a clock that chimes in binary, using tones of different pitches.

While a high and low pitch are the obvious way to express 1 and 0, another way is the encode 1 with a rising interval between pitches and 0 with a descending interval.  A four bit binary number is played in five notes (which is still less than 12).