The word that best completes the sentence is "Alternate" tunings, as it refers to the various tuning methods available for guitars. This term is appropriate since alternate tunings use different notes than the standard setting. Other options like "Vocal," "Circuitous," and "Experimental" do not relate directly to guitar tunings.
;
The best word to complete the sentence is "Alternate" tunings, as they refer to different tuning methods for guitars. Other options like "Vocal," "Circuitous," and "Experimental" do not pertain to the topic of guitar tunings. Alternate tunings offer a range of possibilities for guitarists to explore different sounds. ;