<P> The notes of the 12 - tone scale can be written by their letter names A--G, possibly with a trailing sharp or flat symbol, such as A ♯ or B ♭ . </P> <P> Tablature was first used in the Middle Ages for organ music and later in the Renaissance for lute music . In most lute tablatures, a staff is used, but instead of pitch values, the lines of the staff represent the strings of the instrument . The frets to finger are written on each line, indicated by letters or numbers . Rhythm is written separately with one or another variation of standard note values indicating the duration of the fastest moving part . Few seem to have remarked on the fact that tablature combines in one notation system both the physical and technical requirements of play (the lines and symbols on them and in relation to each other representing the actual performance actions) with the unfolding of the music itself (the lines of tablature taken horizontally represent the actual temporal unfolding of the music). In later periods, lute and guitar music was written with standard notation . Tablature caught interest again in the late 20th century for popular guitar music and other fretted instruments, being easy to transcribe and share over the internet in ASCII format . Websites like OLGA have archives of text - based popular music tablature . </P> <P> Klavarskribo (sometimes shortened to klavar) is a music notation system that was introduced in 1931 by the Dutchman Cornelis Pot . The name means "keyboard writing" in Esperanto . It differs from conventional music notation in a number of ways and is intended to be easily readable . Many klavar readers are from the Netherlands . </P> <P> Some chromatic systems have been created taking advantage of the layout of black and white keys of the standard piano keyboard . The "staff" is most widely referred to as "piano roll", created by extending the black and white piano keys . </P>

When did music notation that we can read develop