especially common in popular music to use chord diagrams above
a staff of traditional notation. The guitar and the banjo are
transposing instruments, sounding an octave lower than written.
-Scores for these instruments should use the @code{"treble_8"} clef (and
+Scores for these instruments should use the @code{"treble_8"} clef (or
@code{\transposition c} to get correct MIDI output).
Some other elements pertinent to fretted string instruments
are covered elsewhere: