Question 1: Vigorous performance styles such as ________, which can involve the use of the guitar as a percussion instrument, call for a scratchplate to be fitted to nylon-string instruments.
Question 3: In practice, ________ determine fret positions using the constant 17.817, which is derived from the twelfth root of two (17.817 = (1-2-1/12)-1).
Question 4: Solid body seven-strings were popularized in the 1980s and 1990s in part due to the release of the Ibanez Universe guitar, endorsed by ________.
Question 7: The introduction of the double-coil ________ in the mid-1950s did away with this problem through the use of two coils, one of which is wired in a reverse polarity orientation.
Question 8: The Spanish ________ or (in Italian) "viola da mano", a guitar-like instrument of the 15th and 16th centuries, is often considered a major influence in the development of the modern guitar.