LEAP YEARS
one rule, a cycle of four hundred years and the ninety-seven extra days in it
MULTIPLICATION TABLE
1 to 12 · colour intensity = size of the product
PASCAL’S TRIANGLE
the first thirteen rows, the sum of each row and the pattern of the odd numbers
REPEATING DECIMALS
which fractions stop, which run for ever, and how to know the length of the repeat without dividing
ROMAN NUMERALS
seven symbols · ones, tens, hundreds · years
THE RULE OF 72
the time it takes steady growth to double: the division you can do in your head, how far it misses and why the divisor is what it is
MICROPHONE POSITIONS
where to place a mic around an acoustic guitar and how each spot sounds — after Shure’s guides
AUDIO CONNECTORS
analog, digital, and speaker wiring · pinouts and balanced signals
AUDIO CARRIERS
seven carriers over a century at one scale, and what each one brought first
BARRE CHORDS
two shapes, twelve chords each
KINDS OF BASS
eight instruments at one scale · what each is about and how it sounds
BIT DEPTH
how many steps the level is cut into, what a bit adds, and why floating point is not the next row
CIRCLE OF FIFTHS
12 keys · key signatures · relative minors
CURWEN HAND SIGNS
one hand for each degree of the scale, with the mental effect John Curwen gave it
DECIBEL SCALES
what stands at zero on each of them, and why −10 and +4 are not fourteen apart
DI, REAMP AND PREAMP
three boxes on one ruler of levels — where each one leads from and to
DRUM KIT NOTATION
where every drum and cymbal sits on the staff — per the Percussive Arts Society standard
THE ELECTRIC GUITAR PICKUP
one coil or two · six builds · where it sits along the string, and how high above it
EQUAL TEMPERAMENT
how many cents each interval misses the pure one by, and why exactly that much
AMP MIC POSITIONS
where to place a mic in front of a guitar cab and how each spot sounds — after the Shure chart
ARPEGGIOS ON TWO STRINGS
major and minor in one position · the bare triad, no octave
ARPEGGIOS ON THREE STRINGS
major and minor in one position · a whole octave on three strings
ARPEGGIOS ON FOUR STRINGS
major and minor in one position · exactly an octave, one note per string
ARPEGGIOS ON FIVE STRINGS
major and minor in one position · an octave and a fifth from the root