How are arpeggios used?
Arpeggios are used over specific chords, and you would change arpeggio every time a chord changes. Yes you heard that right. I still clearly remember sitting on the floor about 15 years old with my jam buddy Andy, and we were trying to play the Miles Davis song Freddy Freeloader. We both knew our arpeggio shapes but were really struggling to change with the chords. When I realised later that the fast be-bop jazz players were changing arpeggio every bar at 240 beats per minute, I almost gave up… But it doesn’t have to be like that. They can be used very easily in basic melody playing and in blues, they are not only for use in Jazz, but if you want to play jazz you MUST learn all your arpeggios and how to use them. Examining a 12 Bar Blues is a good introduction. When you start learning to play blues you will most likely be playing a minor pentatonic over the whole sequence, maybe you learn some licks and stuff, but for the most part you will be playing the one scale over a group of ch