||A Parsons code simply tracks the movement of a tune regardless of key or ryhthm.
if the next note is higher = u
if the next note is lower = d
if the next note is the same = r
e.g. uuduududuu matches the start of both Dorset Four Hand Reel and Bouree a Malochet
Don't use the lead in of tunes
Don't use ornamentation and gracings (twiddly bits)
Between 10 and 20 code letters is usually enough to avoid too many or too few matches
The match can be anywhere in the tune and is shown in red where it was found.