The best approach is to figure out what chords fit with the bassline. Write out a chart of the chords relative to the measures of the song. From there, you can figure that the guitar could be playing any note of the chord plus any transitional notes as the melody unfolds. You can also think in terms of scales but you need to know the key and the chords first. A lot of blues is played in pentatonic or its close relative, the blues scale. Some blues is played in a major scale. I have never heard of a heptatonic scale so would have to listen to it to offer any further suggestions. I doubt if duplicating the bass line on guitar would sound very good.

Colin

I try to critique as if you mean business.....

http://colinwardmusic.com/

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