This system is particularly useful for basslines that have a repeating pedal point such as a low D , because once the note is locked in place with the mechanical `` finger , '' the lowest string sounds a different note when played open ( e.g. , a low D ) .
This system is particularly useful for basslines that have a repeating pedal point such as a low D , because once the note is locked in place with the mechanical `` finger '' , the lowest string then sounds a different note when it is played `` open '' ( e.g. , a low D ) .