Sub Vocalists who have improved since their debut days?

Yeji (I don't know if she's a sub vocal though)

cant think of many except Taemin and Jin

Tzuyu
Wonyoung

Taemin, Joy and Kai

Most of them aren't, because in Kpop it's not really a trend to be better vocalists, especially for sub-vocalist. Most fans don't care about that anyway. But here are some example:

Moonbyul: I know, technically she's "just" a rapper she never had the "sub-vocalist" or even "vocalist" title, but anyone who knows Mamamoo more than a little, knows that all 4 of them are vocalist, and she was an SM trainee too. I'm not even sure if there's another group that doesn't have a sub-vocalist, main or lead-vocalist, everyone is listed as vocalist.

This is why I have to mention Solar too, because since her Mata Hari Musical, she evolved so much. Her belting were great in the past too, but now her voice isn't as airy as back in the day, and her lower range became much better too.

Taemin from Shinee: I think he's one of the best example for the guys.

Kai from EXO: Another great example.

Hyo from SNSD: She's also improved, not a lot but still.

Karina from Aespa: She didn't improve a LOT, but still improved her stamina, and she's not as airy now.

Basically, every sub vocalist in Red Velvet became better in a way, but like I said, most Kpop Idol don't improve much, especially if they're from a BIG company. The biggest improvements usually happen with Idols from smaller agencies, because they have to work much harder to be on top. For mainstream groups, it's enough if they're average at best. Kpop isn't about vocal battles anyway.

Sooyoung and Yoona

none

shuhua

Tzuyu for sure

Also, Yuqi

Irene and Yeri.

Watch RV's killing voice if you disagree. They aren't the most powerful voices, but they are very technically sound and precise, can support, and add great depth to the groups harmonies.

Quote from David33

Most of them aren't, because in Kpop it's not really a trend to be better vocalists, especially for sub-vocalist. Most fans don't care about that anyway. But here are some example:

Moonbyul: I know, technically she's "just" a rapper she never had the "sub-vocalist" or even "vocalist" title, but anyone who knows Mamamoo more than a little, knows that all 4 of them are vocalist, and she was an SM trainee too. I'm not even sure if there's another group that doesn't have a sub-vocalist, main or lead-vocalist, everyone is listed as vocalist.

This is why I have to mention Solar too, because since her Mata Hari Musical, she evolved so much. Her belting were great in the past too, but now her voice isn't as airy as back in the day, and her lower range became much better too.

Taemin from Shinee: I think he's one of the best example for the guys.

Kai from EXO: Another great example.

Hyo from SNSD: She's also improved, not a lot but still.

Karina from Aespa: She didn't improve a LOT, but still improved her stamina, and she's not as airy now.

Basically, every sub vocalist in Red Velvet became better in a way, but like I said, most Kpop Idol don't improve much, especially if they're from a BIG company. The biggest improvements usually happen with Idols from smaller agencies, because they have to work much harder to be on top. For mainstream groups, it's enough if they're average at best. Kpop isn't about vocal battles anyway.

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All SM vocalists improve with time from the main vocalist to the sub-vocalist.

Quote from sonemariam

All SM vocalists improve with time from the main vocalist to the sub-vocalist.

I know, but most of them already good vocalists from the start, that's why there isn't any big improvement later. I think Taeyeon and Wendy are probably the only SM vocalists who didn't really evolved, because they were one of THE best in the industry from the get go.

Shuhua

Taemin one the best improvemen

Kai

Joy got so much better

Jisoo she’s better now than at her debut

Sana

Taeyeon and Wendy have improved so much since debut. Both sound more effortless and have wider ranges than they did at debut. Both produce more resonance and Taeyeon is more consistent in this.

Quote from David33

I know, but most of them already good vocalists from the start, that's why there isn't any big improvement later. I think Taeyeon and Wendy are probably the only SM vocalists who didn't really evolved, because they were one of THE best in the industry from the get go.

I know if you don't listen attentively, or you are tone deaf or vocals aren't really your thing, you'll not notice but those two have improved a lot compared to their debut days.

Listen to their debut vocals and their recent ones especially their solos.

Quote from sonemariam

Taeyeon and Wendy have improved so much since debut. Both sound more effortless and have wider ranges than they did at debut. Both produce more resonance and Taeyeon is more consistent in this.

I know if you don't listen attentively, or you are tone deaf or vocals aren't really your thing, you'll not notice but those two have improved a lot compared to their debut days.

Listen to their debut vocals and their recent ones especially their solos.

I worked with singers, my mother is a vocal coach too, I know everything about this. They didn't improve much since their debut, I follow their career since day 1, they're one of my favorite Kpop singers. Like I said, they were amazing since the beginning. Just because their technique seems more effortless and better, doesn't mean they improved a LOT! Never said they didn't improve. Compared to those I listed already, it's not a big improvement.

I won't argue about this, because I don't see the point. If you want to learn something about vocals and techniques, you can read it here:

Taeyeon: Girls’ Generation’s Vocal Analysis: Taeyeon [Newly Updated] | K-pop Vocalists' Vocal Analyses

Wendy: Red Velvet’s Vocal Analysis: Wendy | K-pop Vocalists' Vocal Analyses

Quote from David33

I worked with singers, my mother is a vocal coach too, I know everything about this. They didn't improve much since their debut, I follow their career since day 1, they're one of my favorite Kpop singers. Like I said, they were amazing since the beginning. Just because their technique seems more effortless and better, doesn't mean they improved a LOT! Never said they didn't improve. Compared to those I listed already, it's not a big improvement.

I won't argue about this, because I don't see the point. If you want to learn something about vocals and techniques, you can read it here:

Taeyeon: Girls’ Generation’s Vocal Analysis: Taeyeon [Newly Updated] | K-pop Vocalists' Vocal Analyses

Wendy: Red Velvet’s Vocal Analysis: Wendy | K-pop Vocalists' Vocal Analyses

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So Wendy did improve.

She def sounds better to me than at debut