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RMS Teacher Association
RMS Teacher Association


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My name is Soren Sedit

I am the headteacher at RMS Vocal Institute. If you want to know more about me please hit the button below or scroll down for more about RMS in general.

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About RMS Vocal Institute

Our story begins all the way back in 2011.

Rocky and her ex-husband Matthew Hekker founded Rocky Music Studio in London together. Rocky had several years of professional singer and vocal teaching experience already at this point, if you want to learn more about her journey you can read it here.

Matthew on the other hand was only taking care of the technical, IT, marketing, administrative and accounting aspects of the business.


So, in 2011 Rocky was a full time lead vocalist, professional session singer and vocal coach for students located in and around London, UK. Up to this point she only taught traditional “clean” singing, but gradually she started to research into the various extreme vocals that quickly became the main focus of Rocky Music Studio.

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In 2013 she left the stage completely behind as the business rapidly grew at RMS, partly due to introducing the very popular option to get vocal lessons online from any part of the world. Within a couple of years she had to find new voice professionals to train and hire as RMS teachers due to the high volume of students wanting to learn the ever more popular screamings and other extreme vocal techniques that RMS specialized in.


With two other teachers on board, making the content for a very popular YouTube channel, plus having 200+ active students mostly from outside of the United Kingdom, RMS became the world’s first International Online Scream & Vocal School and in 2018 it got its final name as

RMS Vocal Institute.

This change of the name happened when Hekker Bros. Ltd bought the company and Matthew took over the management of RMS in the same year.

The milestone year of RMS

2019 was the most important and the most significant year in RMS’ history.

In January 2019 former headteacher Rocky, RMS teacher Søren Sedit and General Manager Matthew Hekker traveled to France to participate in a research trip with a speech language pathologist, a voice scientist and two ENTs. The working title of the research was "Superglottic" and its aim was to learn more about extreme vocals on a scientific level and use the knowledge they gathered together in the pedagogy of RMS Vocal Institute. The research included endoscopic examinations while recording the test subjects performing various extreme vocal techniques in real time.


Watch our compilation video about the research trip here.

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The "Superglottic"

research team in 2019

PEVOC 2019 - Copenhagen

In August the same year, Søren and Matthew represented RMS Vocal Institute at the Pan-European Voice Conference 2019 in Copenhagen. Together with GIPSA-Lab, Soren was leading a 20 minutes long workshop for the attendees who primarily consisted of the world’s most accomplished and acclaimed voice professionals and vocal coaches.
At the end of the workshop, RMS received an unprecedented round of applause and an enormous recognition from the field of voice professionals and even from some voice scientists.

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Soren with two other members

of the "Superglottic" research team at PEVOC 2019

With this, RMS has contributed enormously to our current understanding of extreme vocal techniques and safe voice producing amongst the voice educational community.

To watch the full recording of the workshop, click here.

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Not much after the successful research, Soren created a very unique and comprehensive vocal method called the Master-Key Vocal System around 2020. This vocal system was already based on scientific research & more, and it is a real game changer in every aspect for those who wanted to use their vocal abilities to the top of their game.

The same year Soren took over the position of headteacher of RMS Vocal Institute from Rocky and he reimagined the entire voice pedagogy of RMS with the help of the research results and the basics of MKVS.

RMS Vocal Institute today...

RMS Vocal Institute is on this complete, comprehensive and 100% safe path when it comes to any extreme vocal technique that is known to today’s society.

When it comes to non-clean singing, extreme voice producing and even both modern & classical singing techniques,
RMS has all the tools to offer to each and every performer, singer, voice professional or vocal health seeker, regardless their gender, age, location on the globe or level of their vocal abilities.


RMS Vocal Institute:

Extreme Vocal Training - Safely. Professionally. Online.

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Soren Sedit

Headteacher at RMS

Søren - Headteacher of RMS Vocal Institute - is an experienced and very talented screamer from Denmark. He started singing and creating music with bands in 2003 and started as a voice teacher in 2011.
He started teaching screaming at The Danish Metal Academy for several years and then joined the RMS team of teachers. After working only 2 years at RMS he ended up landing the headteacher position at the institute.
His method is a mix of both real Italian Bel Canto (Italian Classical singing method) and Modern singing, as well as some neuroscience aspects. So you can expect it to be a mix of having a fun time while learning the specific techniques.

Søren is also a creator/author of a neuroscience method for voice named The Master-Key Vocal System, where everything is built on how the body and brain work together.

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He is also a voice actor at The Monster Factory in Canada, alongside some of the most talented screamers in the world, such as, Frank Mullen (Suffocation) Vicky Psarakis (The Agonist) Frederik Södeberg ( Soreption) Rafał Piotrowski (Decapitated)

Søren's teaching methods and vocal techniques were also carefully analyzed and approved in early 2019 on the institute's Research Trip. Two independent ENT doctors, a Voice Scientist and a Speech Therapist all confirmed the fact that over 15 years of intensive screaming did not harm his health in any way, no tissue damage has been found whatsoever.

Bands Søren is/was in:
Die - Rise of the rotten (first album he did)

Now he is in Verdande and Arachnid Purge.

Søren is inspired and influenced by all types of metal music from the heaviest thing you could find all the way to rock ballads. To give a few examples, bands like: Suffocation, Morbid Angel, Deicide, Signs of the swarm, Lorna shore, Vildhjarta, Slipknot, Architects, Devildriver, After the burial Disturbed, Seether, Leprous, Chimaira, Lamb of god, Slayer, Mayhem, Marduk,  and Jinjer.

Vocal effects that Søren specilazed in:
Yell scream, Tunnel throat, Guttural, Growl, Rock distortions, Throat Singing / Kargyraa with and without Overtone singing added as well, Fry screams.

Søren is currently based in Plovdiv, Bulgaria for those who would prefer to get lessons in person and live locally.
Get in touch with Søren:

Former Teachers of RMS Vocal Institute

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Are you a vocal coach?

Are you a singing teacher?

Are you a voice professional?


If you are planning to run your own vocal tuition business or you already have one, you can utilize the knowledge of RMS extreme vocal techniques by becoming an RMS certified vocal coach.

EASY as 1 - 2 - 3!

You only need the following three simple things to get started with your extreme vocal lessons at RMS Vocal Institute:

Internet & device

Reliable and fast internet connection to be able to join video calls of the lessons.

Most people have this already at home or on their 4G / 5G mobile connection - YES, you can have RMS lessons on your phone!!

Sing up & schedule in

You need to create an RMS account on the website. You can do that with your email or with your social media accounts such as Facebook or Google.

Find a time slot that fits you and book it in! That's it!

Pay & Have Fun!

On our website you have the option to pay for your vocal lessons via any major credit cards or Apple Pay or Google Pay.

Then find a place where you can make some noise for an hour and enjoy your lesson!


Rocky Orsi

Former Head Teacher & Co-founder at RMS

Orsi aka "Rocky" is one of the most energetic and passionate Vocal & Motivational Coaches who dedicated her life for coaching, mentoring and helping people improving their life. She is the Head Teacher & Co-founder of RMS Vocal Institute.

She started her musical studies and singing over 20 years ago then she continued at Music College of contemporary music in Budapest, Hungary where she mastered the essence of rock, metal singing, and started her musical carrier as a solo artist. Quite soon after that she established her first band and performed all the major stages and festivals nationally and internationally in the following years. She won national singing contests 2 years in a row of her age of 18 and 19. In 2012 she was chosen from to perform in World Championships of Performing Arts in Hollywood.


Despite her exceptional live vocal performances in 2013 She left the stage in order to focus on coaching only and she founded RMS which became the very first international online vocal school specialised on extreme vocal techniques only in few years. Her unique methods of singing and screaming proved to be highly efficient and safest way to learn these special vocal techniques as in early 2019 on the institute's Research Trip two independent ENT doctors, a Voice Scientist and a Speech Therapist all confirmed the fact that over 20 years of intensive singing and screaming did not harm her health in any way, no tissue damage has been found whatsoever. Since the foundation of RMS Vocal Institute She was fully dedicated to perfect these methods and pass them on to RMS students every day.
In 2020 she have left RMS for personal reasons and left the institute in the more than capable hands of Soren Sedit.


Tara Livingstone

Former Teacher at RMS

Tara began her vocal training with a classical vocal tutor when she was 14, and then went on to take some SLS (Speech Level Singing) and IVA lessons. She then completed a BTEC Level 3 Diploma in performing arts: Completed in Clapham's Lambeth college - London (2013-2014). She then went on to study a degree at what was then "Tech Music School" now know as BIMM London (music college credited by the University of West London) where she achieved a BMUS (Hons) Degree in Popular Music Performance. Inspired by the great powerhouse vocalists, such as: Christina Aguilera, Mariah Carey, Beyonce, Kelly Clarkson, Hayley Williams, Lacey Strum, Amy Lee, Jennifer Hudson, Whitney Houston, JOJO, Celine Dion, and many more, Tara set it out as her mission to accomplish the correct training and techniques it takes to be able to sing as well as these great singers. This is also what added to her interest in joining RMS, in the aims to continue to discover these progressive vocal techniques.

From the feedback from her tutors and peers at BIMM, she was told that Covering Rock songs really suited her voice, and that the Rock vocal techniques come easily to her. Tara first began her career as a professional performer at age 17, working as part of the hotel entertainment team, in prestigious hotels in the Canary Islands and in Menorca. She now performs regularly in various bars and venues across London and is currently writing for her own album. Tara has proudly set-up, and managed her own function band for many year, in which she performs regularly with for events all across the country. She has years of experience teaching privately, and loves sharing her years of collected knowledge and experience with other, in the aims to help them grow.

Tara has left RMS Vocal Institute in 2020.

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© 2018 - 2023 by RMS Vocal Institute, London UK.

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