A musical bass line involves many complex factors, such as different pitches and beats, and consequently it is a difficult thing to reproduce automatically. It may vary depending on the rhythm, chord progression, style of music and the character of the musician. Sometimes it can take the role of a low melody, then it might outline the chords or become a strong rhythmic influence in an ensemble. But overall it is a very important part of the rhythm section, following the chord progression, mainly using the root and fifth note.
