Legato, Legato

That is, in transitioning from note to note, there should be no intervening silence. Legato technique is required for slurred performance, but unlike slurring (as that term is interpreted for some instruments), legato does not forbid rearticulation. In standard notation legato is indicated either with the word legato itself, or by a slur (a curved line) under the notes that are to be joined in one legato group. Legato, like staccato, is a kind of articulation. There is an intermediate articulation called either mezzo staccato or non-legato.

A rapid series of hammer-ons and pull-offs between a single pair of notes is called a trill.When playing legato on guitar, it is common for the musician to play more notes within a beat than the stated timing, i.e. playing 5 (a quintuplet) or 7 (a septuplet) notes against a quarter-note instead of the usual even number or triplet. This gives the passage an unusual timing and when played slowly an unusual sound. However, this is less noticeable by ear when played fast, as legato usually is. There is a fine line between what is legato and what is two hand finger tapping, in some cases making the two techniques harder to distinguish by ear.

This may be achieved through controlled wrist movements of the bowing hand, often masked or enhanced with vibrato. Such a legato style of playing may also be associated with the use of portamento.

In contrast to monophonic mode where every new note restarts the ADSR envelopes, in legato mode they are not if the previous note remains depressed when the new note is played. This causes the initial transient from the attack and decay phases to sound only once and the ADSR's to remain at sustain stage for the whole sequence of notes until the final note is released.

Source: Wikipedia > Legato