For example, when playing the instrument as a flute or drum, the strings sympathetically vibrate and produce their own sound.
(the strings; sympathetically vibrate; T:when playing the instrument as a flute or drum) (the strings; produce; their own sound; T:when playing the instrument as a flute or drum)
the strings the strings
sympathetically vibrate produce
T:when playing the instrument as a flute or drum
their own sound T:when playing the instrument as a flute or drum