The 5-string banjo in Open G tuning (gDGBD) has a unique feature that no other instrument shares: the short 5th string starts at the 5th fret, not the nut. ChordColor renders this authentically -- the 5th string begins partway up the neck just like on the real instrument, and its high G drone is factored into every chord voicing. This drone string is what gives banjo chords their characteristic open, ringing quality in bluegrass and folk music.
Because the banjo is already tuned to an open G chord, strumming all strings without fretting anything produces a G major triad. The interval colors show this clearly -- you can see roots, thirds, and fifths distributed across the open strings. From this home position, common chords like C, D, and Em require minimal finger movement, which is why the Open G tuning is so well-suited to fast bluegrass rolls and clawhammer patterns.
The voicing algorithm generates chord shapes that work with the short 5th string drone rather than against it. For chords where the open G drone clashes with the harmony, the visualizer shows which strings to mute. Cycle through voicings to find positions used in Scruggs-style picking, melodic banjo, and old-time clawhammer playing.