How to Sing Like New (Choi Chanhee) of THE BOYZ: Vocal Range, High-Note Ad-Libs & the Technique Behind It

Singing like New (Choi Chanhee) of THE BOYZ is less about chasing a single high note and more about mastering two core skills: efficient cord closure fed by steady breath support for his top-register ad-libs, and the pitch consistency that lets those ad-libs hold up as reliably live as they do in the studio. Both are trainable through focused technique work, regardless of whether your own voice naturally sits in a high tessitura.

Safety note: None of the techniques here should cause throat soreness, a pressed larynx feeling, or hoarseness lasting beyond 24 hours. New's high-register ad-libs are produced through breath support and efficient cord closure, not by forcing chest voice upward or squeezing the throat. If you feel strain, reduce volume and rest. Consult an ENT specialist for hoarseness lasting more than two weeks.

New's Vocal Profile

There is no officially confirmed, cross-verified numeric vocal range published for New (Choi Chanhee) of THE BOYZ. Rather than state a figure that can't be backed by a reliable source, this guide focuses on what is well documented: his role as one of THE BOYZ's three main vocalists, alongside Sangyeon and Kevin, with particular responsibility for the group's top-register ad-libs and high notes.

Within that shared vocal line, two qualities are consistently associated with his delivery:

• High-register ad-lib specialization — a go-to voice for the explosive top notes that punctuate a chorus or bridge, produced through coordinated breath support and cord closure rather than raw volume.
• Live performance reliability — frequently noted for holding tone quality and pitch steady in live settings, not only in studio takes, which points to well-trained breath and pitch-matching habits rather than a fixed vocal advantage.

In softer, more exposed passages, his tone is also often described as clear and unforced — a useful reminder that a high-note specialist still needs a controlled, low-effort default setting to build power from.

New's Signature Songs — by Vocal Challenge

Approaching THE BOYZ's catalog by what each passage demands, rather than by popularity, gives you a natural training order. Transpose any of these to a key that fits your own range.

Start at the top of the table and move down only as each technique becomes reliable. "Thrill Ride" is the destination, not the starting line.

The 3 Techniques Behind New's Sound

High-Note Ad-Lib Specialization

New's signature moments come from coordinated breath support and efficient cord closure at the top of his range — not from pushing chest voice higher or tensing the throat to force a note out. This is the mechanism behind ad-libs like the one in "Thrill Ride," where the note has to cut cleanly through a full production without sounding strained. The most common mistake learners make is chasing volume before the underlying cord-closure coordination is stable, which produces tension instead of a clean top note. In Bloom Vocal, C-10 (Belt Load Management) trains exactly this coordination at controlled volume before power is added. The K-pop high notes training guide covers the shared mechanics behind high-register ad-libs and belting across male idol vocal lines.

Live Performance Reliability (Pitch & Breath Under Pressure)

What sets a dependable live vocalist apart is not a different set of notes — it's the ability to hold breath support and pitch accuracy steady under stage conditions: adrenaline, movement, and imperfect monitor mixes. New is frequently noted for this kind of consistency. It is trained by practicing pitch-matching and breath support drills under mild added pressure — moving while singing, or singing through light physical exertion — so the coordination doesn't collapse the first time it's tested outside a quiet practice room. In Bloom Vocal, B-1 (Pitch Matching) builds the accuracy foundation this reliability depends on. The K-pop idol vocal style analysis covers how live-versus-studio consistency shows up across idol vocal lines more broadly.

Clean, Clear Tone in Exposed Passages

A high-note specialist still needs a controlled default setting, and New's softer passages — like the more vulnerable delivery in "Sober" — are often described as clear and unforced. This comes from forward, low-effort resonance rather than airflow that's simply reduced along with the volume; a genuinely clean soft tone still needs breath support underneath it to stay in tune. Skipping this in favor of only training the big ad-libs is a common gap, since a shaky soft passage undercuts the credibility of the powerful one that follows it. In Bloom Vocal, E-3 (Mask Resonance) builds this forward, supported placement. The mix voice practice guide covers the registration control that keeps softer passages stable as they build toward a chorus.

How to Train Toward New's Style

Step 1 — Find your comfortable key and baseline first

Run a range test from your lowest to highest comfortable note before attempting any THE BOYZ song. New's ad-libs sit at the top of his own range, but the songs work transposed to fit other voice types. Knowing your baseline prevents the strain that comes from chasing his exact pitch placement before your technique is ready.

Step 2 — Study the ad-lib target, not just the melody

Pick one passage built around a high-register ad-lib — the "Thrill Ride" chorus is a strong reference — and listen twice: once for the main melody, once for exactly where the tone shifts into the ad-lib run. Identify the breath and cord-closure demand of that specific moment before attempting it, so your practice targets a technique rather than an impression.

Step 3 — Build breath support as the foundation

New's top-register ad-libs stay clean because they sit on steady, well-supported breath pressure. Train diaphragmatic breath control so airflow stays consistent under load before adding any belting attempt. Almost all strain on high ad-libs traces back to inconsistent breath delivery rather than the vocal cords themselves.

Step 4 — Train belt-load control and pitch consistency at moderate volume

Work C-10 (Belt Load Management) at around 60 percent volume so cord-closure coordination is trained before power is added. Layer in B-1 (Pitch Matching) under light added pressure — such as singing while moving — to build the kind of live reliability New's delivery is known for.

Step 5 — Run an AI feedback loop on a single phrase

Choose one 8-bar passage — a high-register ad-lib is ideal — record it, and use Bloom Vocal's AI coaching to score your pitch accuracy, breath support, and register consistency. Compare playback to the original for cord closure and breath support first, tone quality second. The AI surfaces specific habits, like breath drop right before a peak ad-lib, that are difficult to catch by self-listening alone.

Check Your Cover with AI

Ear-based imitation has a ceiling: you can't reliably hear your own breath support thinning out or your pitch drifting under load while you're mid-performance. Record a passage from New's catalog — the ad-lib climax in "Thrill Ride" or the softer, exposed delivery in "Sober" — and Bloom Vocal's AI scores your pitch accuracy, breath support, register transitions, rhythm, and expression on a 1–5 rubric, then recommends the specific exercises to address your weakest area first. It turns "that ad-lib didn't quite land" into "your breath support dropped right before the peak note — drill C-10."

For a broader framework on how idol vocal styles map to trainable techniques, see the K-pop idol vocal style analysis. To train the vocal profiles of New's fellow lead vocalists in THE BOYZ, see how to sing like Sangyeon, how to sing like Hyunjae, and how to sing like Juyeon.

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References

• Sadolin, C. (2000). Complete Vocal Technique. Shout Publishing. [Vocal modes and the laryngeal configurations behind neutral and overdrive (belting) productions, including cord-closure demands at the top of the range.]
• Titze, I. R., & Verdolini Abbott, K. (2012). Vocology: The Science and Practice of Voice Habilitation. National Center for Voice and Speech. [Breath support mechanics, sub-glottal pressure management, and cord closure consistency under performance conditions.]