Completely natural way to achieve a perfect 20/20 vision

http://metanailss.ru.com/p8a1fkT3R_9ScXQv9JwhMrdONEz5QzkDOf0o95otGA6v-l2d

http://metanailss.ru.com/K-LTJ8OT9wImn7-6UXzLR-z6BEik-FrFZuoXrxTJNdvFdMk

It indicates that the marked note should have an emphasized beginning and then taper off rather quickly. Though it is usually simply referred to as an accent. In jazz articulation, it is stated as "dah".
The vertical wedge, shown second, signifies that a note should be played marcato (Italian for "marked"). It is generally accepted to be as loud as an accent mark and as short as a staccato. Martellato, Italian for "hammered", is another name for the marcato symbol used primarily by orchestral string musicians as it refers to the specific bowing technique used to create marcato. In jazz articulation, marcato is typically stated as "daht" yet the performing musician may interpret the duration of the note differently depending on what style of jazz they are playing.

Finally, the tenuto mark, shown fifth above, generally means that a note or chord is to be played at full length. In jazz articulation, it is stated as "doo".
Even when these symbols are absent, experienced musicians will introduce the appropriate gesture according to the style of the music. Mark McGrain writes about articulation on page 156 in his book Music Notation: Theory and Technique for Music Notation. The marcato accent in the third mark shown is also known as the forzato accent. The notation commonly known as just an accent is also known as the sforzando accent. "Neither of these accents alter the durational value of the note or voici