her fourth studio album, Red. Her albums were promoted to country radio, but music critics noted wide-ranging styles of pop and rock. After 2010, they observed that Swift's melodies are rooted in pop music, and the country music elements are limited to instruments such as banjo, mandolin, and fiddle, and her slight twang; some commented that her country music identity was an indicator of her narrative songwriting rather than musical style. Although the Nashville music industry was receptive of Swift's status as a country musician, critics accused her of abandoning the legitimate roots of country music in favor of crossover success in the mainstream pop market. Red eclectic pop, rock, and electronic styles intensified the critical debate, to which Swift responded, "I leave the genre labeling to other people." Music journalist Jody Rosen commented that by originating her musical career in Nashville, Swift made a "bait-and-switch maneuver... planting roots in loamy country soil, then pivoting to pop". She abandoned her country-music identity in 2014 with the release of her synth-pop fifth studio album, 1989. Swift described this as her first "documented, official pop album". Her albums Reputation (2017) and Lover (2019) have an upbeat pop production; the former incorporates hip hop and trap elements. Although reviews of Swift's pop albums were generally positive, some critics lamented that the pop music production indicated Swift's pursuit of mainstream success, eroding her authenticity as a songwriter nurtured by her country music background—a criticism that has been retrospectively described as rockist. Musicologist Nate Sloan remarked that Swift's pop music transition was rather motivated by her need to expand her artistry. Swift eschewed mainstream pop in favor of alternative styles like indie rock with her 2020 studio albums, Folklore and Evermore. Clash said her career "has always been one of transcendence and covert boundary-pushing", reaching a point at which "Taylor Swift is just Taylor Swift", not defined by any genre. Voice Swift possesses a mezzo-soprano vocal range, and a generally soft but versatile timbre. During her career as a country singer, her vocals were criticized by some as weak and strained compared to those of her contemporaries. Swift admitted her vocal ability often concerned her in her early career, and has worked hard to improve. After transitioning to pop music with 1989, reviews of her vocals remained mixed; critics complained that she lacks proper technique but appreciated her usage of her voice to communicate her