This is an original, "Ulterior Motive." Line 1 is the melody, line 2 is the bass line. Both feature challenging arpeggio figures in measure 7 and in the last two measures, and the melody line has a lot of challenging chromatic lines. If your bass has fewer than 24 frets, the last melody figure (in bars 15 and 16) can be dropped down an octave, in unison with the lower part. You can hear the original at www.myspace.com/davidlockeretz. Enjoy!