If I could be a solo...I think I'd be Eruption...
View post (scales up and down the fretboard)
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I always memorize full neck scales one string at a time...after all, they're just a bunch of notes. Try soloing on the first string, getting a feel for that, then adding the second string and so on. As far as going up and down whenever you want, feel free to do so, it's the same notes only at a higher or lower pitch.