"If I get an idea for a song, I have a melody for it. I'm a musician first. I'm not limited by the fretboard"

Brad Paisley is revealing his imaginative process as a musician. He is stating that when he gets an idea for a song, he currently has a tune for it. This implies that he is able to develop tunes quickly and intuitively. He is likewise stating that he is not limited by the fretboard, meaning that he is not confined to the notes and chords available on the guitar. He is able to create music that is not restricted by the instrument he is playing. This quote shows that Brad Paisley is an innovative and talented artist who is able to come up with unique and interesting melodies. He is not confined to the notes and chords offered on the guitar, and is able to produce music that is not limited by the instrument he is playing. This quote shows that Brad Paisley is an imaginative and gifted artist who is able to create distinct and fascinating tunes.