The possibility of moving from one fret to another on the same string is a typical guitar practice which allows you to transport one note to another, in order to create a slur between the notes. However this type of slur is different from a hammer-on or a pull-off, which we will see shortly. In fact with this slide, the note is transported to the next note, as well as hearing the eventual intermediary notes.
In the first bar we see a classical example of the slide that moves from a low note to a higher note of a tone. After playing the note on the 5th fret, the finger slides up to the 7th, without detaching from the string and, above all, maintaining the pressure on the string. In this way you will obtain the effect with maximum precision. The result will be a note that increases in tone, where you also hear its intermediary passages (the C# note ). The D note of the 7th fret is not played, seeing it's created by the slide. This is defined as an ascending slide, while the descending slide between the 7th and 5th frets will be analyzed later. Below you will find some other examples of slide based on the same system, following the recommended fingerings.
The slide is also used to create acciaccatura in the notes. As seen in the example below, in the first bar the C note of the 5th fret is anticipated by a small note (the small number 3). This forces us to start playing from the 3rd fret and immediately sliding the finger to the 5th fret, where the real note is found, which is intended by the value of time (a quarter note). The slide therefore must be very fast and immediate. Other examples of slide acciaccatura will follow.
When we speak of legato, we intend the use of the hammer-on and pull-off techniques, which is the ascending and descending slur between two (or more) notes. It is used often in the improvisation, because it can be the source of variation in the succession of the notes and in the expressiveness that they have. This technique is also used to acquire different ways of playing, in many cases with quite complicated fingerings. This subject deserves a closer examination, and for this reason you can find an entire section devoted to it.
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