Vocal Range

C#3 ~ C#6 (3 Octaves)

Supported Range

A3 ~ A4/Bb4

Voice Type

Light-Lyric Soprano

Strengths/Achievements Has shown improvement in stability, nasality, support, intonation and control since debut Able to keep a relaxed supported sound up until A4 and Bb4 occasionally Able to support down to A3 with enough vocal tone and projection Able to switch into falsetto comfortably and stay in that register Has earned enough support to have a somewhat supported one octave range At times notes in between B4 ~ C#5 can be done with little strain Tied as second strongest vocalist in f(x) Weaknesses Very limited vocal range and supported range Notes below A3, although present, become cloudier and less clear as she descends Airiness is very present in her voice, in falsetto, mix and lower range Her falsetto is very weak and sounds quite limited in terms of projection and placement Larynx raises quickly in her mix and isn’t stable throughout her range Nasality is present in all of her voice Intonation may at times go off and cause flatness in pitch Tone production is very weak and shaky Lacks control of dynamics and support Lacks power and resonance Her vibrato is a very shaky wobble Notes above Bb4 are often strained, whiny, and achieved with a high larynx Registers Lower register: Very unsupported and underdeveloped, notes below A3 generally are considerably airy and weak in placement and cord connection. Able to extend down to above F#3/F3 with some vocal tone and down to C#3 overall. Mixed register: Generally very weak in support and placement and although stability of larynx is kept up until A4/Bb4, true support is quite weak due to the unstable wobbly vibrato and tension. She has shown the ability to extend her mix up until E5, however. Upper register: Very limited and airy, with weak support. Although she’s able to switch into it easily and keep a stable pitch, the tone production is quite shaky and small in sound. She uses this register well, though, when avoiding the strain on her voice by switching into falsetto at times. Agility

Possessing a very light voice, Krystal lacks control and stability in her breath support resulting in a voice that isn’t capable of many advanced techniques, one of these being vocal runs/ornaments. She rarely, if ever, attempts anything outside of her comfort zone and she occasionally may play around with very simple vocal runs but they’re more trills than anything by quickly going around two to three notes in a quick word, adding more of an emphasis than any actual control of vocal agility. It shows that, since she may lack control, she doesn’t attempt to do things her voice isn’t capable of.

Overall analysis

As the lead vocalist of f(x) and the second strongest vocalist in the group, Krystal has earned a name for herself in the K-pop music industry as a singer, dancer, actress and last, but not least, the younger sister of Girls’ Generation’s Jessica. As such, she and her sister not only share similar looks, but also similar voice tones. Krystal’s voice light and bright like her sister’s, but more fragile and smaller in size and volume. A very youthful girly tone, Krystal’s voice is a light-lyric soprano with a voice that is instantly recognizable as her own, or at times mistaken as her sister’s.

As a vocalist, Krystal has always been highly overshadowed by group mate Luna, whose vocal technique, skill and power create such a gap between the two. Nonetheless, Krystal is still a lead vocalist in the group and should be treated as such.