Guitars Glossary: R
raking: Striking a string with one finger and then striking the next lower string with the same finger.
relative tuning: A way of tuning the guitar to itself so that you don’t need any outside reference pitch.
repeat sign: In musical notation, a combination of one thick and one thin vertical line with two dots that tells you that you repeat some portion of the song.
rest: Any time during a musical piece in which no notes are being sounded.
rest stroke: A right-hand stroke — unique to classical music — in which you pluck straight across (not upward) the strings so that your finger lands, or rests, against the adjacent lower-pitched string.
rhythm: A regular pattern of beats or pulses in music.
rhythm slashes: An indicator in guitar notation that uses slash marks (/) that tell you how to play rhythmically but not what to play.
rollers: The tuning posts on a nylon-string guitar that uses a slotted headstock.
rubato: Musical phrasing and timing that is governed by the musician's musical ideas instead of by the strict adherence to a set tempo.