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"Before I began studying Speech Level Singing, I was someone who couldn’t sing high notes.

I learned from Seth Riggs how to train my voice to reach those high notes, and now I have a completely different voice. With this method, I help students sing high notes."

Vocal Consultant, Jacob Nah (나종운)

Maestro Seth Riggs & Teacher Jacob Nah
Maestro Seth Riggs & Teacher Jacob Nah
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Speech Level Singing Background

  • Studied under Seth Riggs for 10 years (2007~2016)

  • ‘Speech Level Singing’ Vocal Technique Lv3.5 Instructor (The highest level instructor in Korea)

  • 19 years of SLS experience (as of 2025)

​SLS Career Highlights

  • 2007 - First lesson with Seth Riggs

  • 2007 - Organizing member of the Seth Riggs Vocal Seminar in Korea

  • 2008 - Attended SLS Teacher's Conference (Seoul)

  • 2009 - Attended SLS Teacher's Conference (Seoul)

  • 2010 - Certified as SLS Instructor Level 1 (4th in Korea)

  • 2010 - Founded Kenny Vocal Studio in Hongdae, Seoul; taught professional singers, musical actors, trainees, and over 60 students weekly

  • 2011 - Certified as SLS Instructor Level 1.5

  • 2011 - Attended Speech Level Singing International Vocal Technique Teacher's Conference (Salt Lake City)

  • 2012 - Certified as SLS Instructor Level 2 (first in Korea to achieve this level)

  • 2012 - Attended Teacher's Conference (Seoul)

  • 2013 - Certified as SLS Instructor Level 2.5 (first in Korea to achieve this level)

  • 2013 - Attended SLS Vocal Technique Boot Camp (LA) - live demonstration in front of SLS Instructors

  • 2014 - Certified as SLS Instructor Level 3 (first in Korea to achieve this level)

  • 2014 - Attended SLS Vocal Technique Boot Camp (LA) - live demonstration in front of SLS Instructors

  • 2015 - Certified as SLS Instructor Level 3.5 (first in Korea to achieve this level)

  • 2015 - Attended SLS Vocal Technique Boot Camp (LA) - live demonstration in front of SLS Instructors

Other Education and Certificates

  • Studied Classical Voice with Jenny Anvelt for one year

  • Jenny Anvelt Masterclass, Amalfi Coast Winter (Jan 2023)

 

Professional Vocal Coach Training

  • TV Show 'Voice' in Uruguay Vocal Coach ' Juan Dittrich' 

  • Former HYBE Entertainment Japan, Vocal Trainer 'Sumi'

  • Former YG Entertainment Vocal Trainer 'Peter'

 

Professional Singers, Actors and TV Shows Training

  • Professional Singers: KYRELL (AMPERS&ONE), J1 (포맨), 서인국(슈퍼스타K 우승), 조문근(슈퍼스타K 준우승), 제국의 아이들, FUMA(&TEAM), YUMA(&TEAM), ect...

  • Professional Actors: 김강우, 이기우, 정석원, 김산호, etc...

  • M.net Superstar K Season 1 Trainer 

​​

Performing

  • Opening Performer at the 1st Jarasum World Jazz Festival

  • Backup Singer for TV Shows and Concerts (2002~2006)

  • Musical The King and I / Interpreter / The Taylor Performing Art Center​ (2016)

Teachers

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