3 Bass Lines for 7-String Guitar

In choro and much of Brazilian popular music, a very common transition is from the I chord to the IV chord using a dominant with a seventh in the bass.

This is exactly the type of movement that Rafael Mallmith presents in this video, exploring three bass lines that move from the tonic and prepare for the IV chord on the 7-string guitar. More than just an isolated resource, it is a cell of language that is very present in the accompaniment of choro, samba, and other forms of Brazilian popular music. This type of bass line serves at least three functions. The first is harmonic: it clarifies the direction of the progression. The second is rhythmic: the bass gains momentum and makes the transition feel fluid. The third is stylistic: the progression ceases to be merely functional and begins to sound distinctly Brazilian, within the tradition of accompanying guitar.

On the 7-string guitar, this approach gains even more strength, as the instrument's lower range allows for a richer, clearer, and more pronounced sense of arrival. Therefore, studying these formulas is not just about memorizing phrases but understanding how the bass organizes the musical discourse and helps stitch together different parts of the repertoire.

The educational value of the video lies precisely in this: Mallmith does not simply show three finished patterns, but a principle of construction. By understanding this principle, the student begins to recognize the logic of the language and starts to apply the idea in different keys, accompaniments, and roda contexts.

In other words, this is one of those seemingly small techniques that are central to fluency in accompaniment. Mastering this type of preparation allows musicians to better sustain harmony, anticipate changes, and accompany with greater authority within the choro language.