An arpeggio is actually the technique
of playing the notes from a chord
in rapid succession. Not so fast that you hear every note of the chord at once, that would be strumming
, but slowly and sharply, making each note clear.
Arpeggios don't have anything to do with scales as mentioned in an earlier node, and I'm not sure what an "outline of a scale
" is, exactly.
In regards to guitar
The arpeggio technique can be applied to more than one chord at a time using a technique called sweep picking
, where you change the fingering
of the chord you are making halfway through the arpeggio so as to retain the arpeggiated sound
and make a chord that would be impossible
to make normally, perhaps because you'd have run out of fingers when trying to make it while strumming, or because you'd be barring
notes that you don't want to play.