This is So-So Solo — the chillest, fastest, and easiest calculator for pentatonic scale and natural scale for guitar. It’s everything a newbie needs to shred some solos and get the hang of finding notes on your fretboard. All you gotta do is hit play on a backing track or your fav song, select the key tone of the song here. Then, just start noodling around with the notes on the fretboard — no matter what order you play, boom, it’ll magically sound good with the music. Rock on!