Hi, I'm Anna-Maria Hefele.
I help musicians, voice artists –and you– sing two notes at once.
A science-based path to unleash the power of your voice and master the art of overtone singing.
"Jaw-dropping."
"As close to REAL MAGIC as it can get."
"How is she doing that?"
At the Overtone Academy
you'll find out –and join in. J
Hi, I'm Anna-Maria Hefele.
I help musicians, voice artists – and you – master the art of overtone singing.
A science-based path to unleash the power of your voice and immerse yourself in a journey of harmonic discovery.
Some say I’m a voice alchemist. Others that I'm an angelic sirene. Others drop their jaw: “how is she doing that?”
At the Overtone Academy, I’ll show you exactly how – and help you do it too.
🎓 Ready to uncover the mystery behind overtone singing – and make it your own?
✨ Imagine this...
You open your mouth—and suddenly it sounds like two voices are singing at once. The room falls silent. Everyone is captivated by the impossible. ✨
People are mesmerized by a sound they’ve never heard before. At that moment, you’re not just noticed – you’re recognized as someone who can do something rare and extraordinary.
Many students don’t even know they long for this kind of mastery – it’s a desire they might never have spoken aloud. The thrill of creating something beautiful, of standing out, of expressing what’s deepest inside themselves… that’s what draws them in.
And that’s exactly why the Overtone Academy exists.
We take you by the hand, step by step, from your very first overtone to complete artistic freedom. Every exercise, every module, every guided practice is designed to transform hidden longing into a resonance that becomes audible, unmistakable, and profoundly touching.
Your dreams turn into tangible results.
Your curiosity becomes confidence.
And your voice becomes a sound that truly moves people.
All along the way, you’re not left alone. We guide, support, and hold the structure, so that your focus stays on exploration, joy, and expression, rather than frustration or confusion.
WHAT´S NEW ABOUT THIS COURSE?
Our Features
We've updated the whole Overtone Academy to make it more accessible, richer in information and easier to access.
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A completely new learning experience
Everything is now integrated in one single platform — no more juggling between Vimeo, PDF downloads and separate audio files. Just log in and start learning — anywhere, anytime.
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Fully mobile and device-friendly
Whether on your phone, tablet, or computer — the course adapts beautifully to your screen. Your learning experience will always be smooth and intuitive.
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Improved structure
We have redesigned the structure of the course to make learning even easier. The content is now clearly organized and guides you step by step.
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New supporting texts for better self-learning
Many of the original videos are now complemented by clear written explanations. This helps you deepen your understanding and practice more effectively.
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Built on real student feedback
The improvements in this course are based on hundreds of hours of teaching and on the valuable feedback from past students. We’ve listened and optimized!
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In addition to the original material, new videos will be added over time — so your learning journey will continue to grow and evolve.
🎓 This is more than learning a skill.
It’s a journey from hidden desire to full expression – a path that uncovers your own voice, your own power, and your own brilliance.
At the Overtone Academy, you’ll follow a clear, step-by-step path designed to take you from your very first overtone to full vocal mastery.
A Complete and Detailed Learning System
Over 15 professionally recorded video lessons, with step-by-step instruction and clear demonstrations
Multiple MP3 practice tracks to guide your daily vocal exercises
Downloadable PDF sheets with musical notation, harmonic charts, and detailed practice guides
Suitable for self-paced learning with lifetime access to all materials
Designed to support both beginners and advanced singers with a clear progression path
WHAT IS INCLUDED IN THIS COURSE?
COURSE OVERVIEW
Beginner Level: Build a Strong Foundation
Hear and isolate your first overtones — even if you’ve never done it before
Understand the harmonic series and how it shapes overtone singing
Learn the key vowel shapes and mouth positions to bring out overtones clearly
Practice step-by-step exercises with visual hand guidance for each harmonic
Cultivate deep listening and develop a new relationship with your voice
Intermediate Level: Precision, Control & Repertoire
Extend your range in the harmonic scale and refine each overtone’s clarity
Gain control of dynamic tone shaping through tongue and lip coordination
Learn how to navigate between harmonics smoothly and with intention
Practice tone repetitions, overtone “jumps,” and fine control in melodies
Explore musical phrasing, timing, and expression using overtones
Expand your overtone repertoire and start improvising simple lines
Advanced Level: Freedom, Musicality & Improvisation
Discover how to sing overtone-based music in your natural vocal register
Practice advanced melodic phrasing using multiple fundamentals and harmonic transitions
Gain fluency in switching harmonics with precision and musical expression
Explore overtone improvisation and composition
Understand how overtone singing integrates with other musical forms and styles
Additional Resources
How to practice
The History of Overtone Singing
How to use the Overtone Analyzer Software and...
Much, much more!
🎁 Exclusive Bonus: €50 Off
Get €50 towards your very first private Masterclass with Anna-Maria – a unique chance to learn one-on-one, tailored to your voice and goals. (This bonus is included in this course)
Master the Art of Overtone Singing
Why are women rare in overtone singing 🎶 – And what 🔬 science says
Overtone singing works for all voice types.
However, it has traditionally been dominated by lower (male) voices, since deeper vocal cords naturally generate a broader spectrum of singable overtones. Higher voices, with their shorter vocal folds and more focused resonance spaces, can achieve very precise control over single overtones. However, unlocking the full harmonic richness in these ranges requires specialized techniques.
The Science Behind Overtones
Every note has a fundamental frequency (f₀), and overtones are its whole-number multiples:
fₙ = n × f₀
A deep base note (e.g., 147 Hz) produces many overtones naturally — all the way up to the 3500 Hz limit of the human vocal tract
A higher note (e.g., 392 Hz) generates fewer overtones before hitting that same limit
Think of it this way: for ultra-high tones you’d need a mouse’s mouth, for very low ones, an elephant’s!
(Low voice = 147Hz → up to 17 natural overtones — OT stands for overtones)
(High voice = 392 Hz→ about 5–6 overtones, need technique + fundamental changes to expand the spectrum)
(We’ve shown low vs. high overtone ranges—now see for yourself as Anna-Maria performs the overtone scale in an MRI, harmonics visualized in real time!)
Anna-Maria went viral as a young woman in this male-dominated field. Over the past 20+ years on stage and with hundreds of students, she has developed unique solutions to the hardest vocal challenges, pushing the physical and acoustic limits of the human voice until the impossible became possible.
Many women find it easier to learn from Anna-Maria because her voice and timbre are similar – no need to translate or abstract techniques: her method works 1:1, directly and precisely.
They feel at home immediately, achieve fast results, and love the science-based, result-driven teaching style. They also thrive with Anna-Maria’s power and energy:
“She's got it!!”
“If she can do it, then I can do it, too.”
Imagine how it would feel to finally connect deeply with your own voice… to explore your creativity fully… to experience the thrill of mastering something that once seemed impossible.
Students often describe the breakthrough moment when two tones finally click, tears of joy flow, and they realize: “Yes, my voice can do this!” Even if you do it just for yourself, the boost in self-confidence and the joy of achievement is transformative.
Anna-Maria is relentless – a creative powerhouse with hyperfocus, perfectionism, and the stubbornness to push through walls until she finds a solution.
The result? A proven system that lets you focus on what matters most: connecting with your own voice, awakening creativity, and mastering something truly extraordinary.
👉 Join the Course Now – Awaken the Magic in Your Voice
P.S. A Glimpse Behind the Scenes
If you’re wondering where Anna-Maria’s precision, perfectionism, and creative problem-solving come from, here’s a peek into another world she mastered: display model building.
(Young Anna-Maria on the tower of the Deutsches Museum, where the famous Foucault pendulum demonstrates Earth’s rotation through steady oscillation — a reminder that vibration, whether in physics or in sound, is the essence of resonance.)
At just 16, Anna-Maria began her apprenticeship as a display model maker at the Deutsches Museum in Munich. Her workpieces demanded absolute precision: exact angles, measurements down to tenths of a millimeter, flawless joints with no excess glue.
No shortcuts – just pure, meticulous craft skills.
The very same year, she also started overtone singing. What began as a spark of curiosity soon mirrored the same discipline and attention to detail she applied at the workshop bench. A few years later, that combination of passion and precision would not only earn her the title of Germany’s best graduate in her craft, but also lay the foundation for her pioneering path as an overtone singer.
Yes, she really built these 👇😅
Learn to sing two notes at once – and watch jaws drop. - Axel
A great overtone singing workshop from a wonderful teacher and person!!! - Iannis
I've been following you and your channel for many years now, by the way, and absolutely love how genuine you are and the quality of your work. - Terrence
Anna-Maria Hefele
I'm not your average voice coach — and overtone singing is anything but an average vocal technique.
Anna-Maria Hefele is a classically trained singer, voice nerd, and overtone sorceress. She didn't get her two-note superpower from a UFO beam—it's all curiosity, training, and years of practice.
Imagine growing up facing bullying, violence, and untreated ADHD at school, in a home full of music but with limited means. Anna-Maria found refuge in fantasy novels and the stage, where her voice could soar and her creativity take flight.
She discovered overtone singing at 16, after hearing it once on the radio — and instantly fell under its spell. By pure chance (or was it resonance?), the man behind that radio voice lived on the very same street.
She took a deep breath, knocked on his door, and became his student.
With little money and no formal training (yet), she dove into the world of harmonics headfirst — armed with books, CDs, and relentless curiosity. She mastered polyphonic overtone singing through relentless curiosity and research very few had done before. Years of trial and error turned into practical, repeatable techniques — now simplified into a clear path for her students.
Pioneering as a woman in a male-dominated field, she shows how anyone can master this unique voice technique.
She later studied music and dance education with a major in classical singing at the Mozarteum Salzburg, blending academic precision with vocal exploration.
Today, she’s an internationally acclaimed performer with over 22 million YouTube views and students around the world. Her teaching is clear, grounded, and refreshingly no-nonsense. You won’t need incense or crystals — just your voice, your ears, and the will to learn.
Oh — and yes, she’s bald at the moment. That’s alopecia. But just like with overtone singing, she faced it in her own unmistakable way: with courage, clarity… and a good ol' cutthroat razor.
➡ Ready to discover what your voice is truly capable of?
Join the Overtone Academy and start YOUR OWN journey NOW.
The Next Step: From Online to In-Person
If you’ve come this far, it probably means something resonates with you.
Not just the science, not just the structure – but the possibility of discovering a sound that is truly your own.
For some, the this course from the Overtone Academy is all they need: a complete, step-by-step system that unlocks the magic of overtone singing.
But for a few, there comes a moment when you realize: I want to go deeper. I want guidance, feedback, and real-time resonance with a teacher who listens.
That’s why we also offer personal masterclasses – here in 📍 Passau (Germany)👇.
Or anywhere over Zoom 🌍.
A personal masterclass is not for everyone. And that’s the point.
If you value precision and discipline,
if you’re willing to bring patience and curiosity,
if you want to experience your voice unfolding in real dialogue –
…then this might be your path.
No rush, no pressure. Just an invitation.
If you feel called, you’re welcome to step inside.
NEED HELP? WE GOT YOU COVERED!
FREQUENTLY ASKED QUESTIONS
Still wondering if this course is right for you?
You're not alone. Many people have questions or doubts before they begin – especially with something as unique as overtone singing.
Here are some of the most common questions we've received – and honest answers to help you decide.
I have no musical background. Can I still learn overtone singing?
Absolutely. Most students are able to produce audible overtones within the first few minutes of practice – no prior musical training required. You don’t need to read music or understand theory to get started.
Is this course right for me, if I have an interest in sound healing and/or esoterics?
If you’re mainly after cosmic shortcuts, this isn’t the course for you. It’s all about music, technique, and real practice.
But if you want to master overtone singing, train your voice, and see real progress, you’re in the right place. (Spoiler alert: No cosmic frequencies in a box—just results through practice.)
With time and dedication, your voice can shine just like Anna-Maria’s: heavenly, angelic, unforgettable.
I’m afraid to sing in front of others. Is this course still for me?
Yes, especially if you feel that way. Many people carry deep-rooted fears or shame around their voice. In this course, you can practice safely at home – without anyone listening in. You’ll be guided step by step to feel more confident and free.
I’ve tried overtone singing before and couldn’t get it. What’s different here?
This course breaks everything down into simple, practical steps based on years of teaching experience and scientific voice research. You’ll understand not just what to do, but how it works and why. That’s what makes the difference.
Do I need any special talent to sing overtones?
Not at all. Overtone singing is a learnable skill – like whistling or riding a bike. If you can make a steady tone with your voice, you can learn this.
What if I don’t get the ‘whistle’ or loud overtones?
Those sounds (especially in the advanced module) take coordination and focused practice. You’ll get all the tools to get there. If you get stuck, you can reach out for private coaching to help fine-tune your technique.
How do I know if I’m doing it right?
That’s a common challenge – your voice sounds very different inside your head than it does in the room. You’ll learn how to listen more precisely, and we recommend recording yourself to compare with the guided examples.
We’ve included detailed exercises with a spectrum analyzer and self-recording, so you can get clear feedback and know exactly what you’re doing—even when practicing alone.
Are there any health reasons I shouldn’t do this?
Only very few. If you have a diagnosed vocal cord issue (like nodules or paralysis), please consult an ENT or phoniatrician before starting. Otherwise, overtone singing is generally safe – and can even help improve vocal health and technique.
14 DAYS
“Yes, You Can Sing Overtones”
Money Back Guarantee
We’re confident that you can learn overtone singing — and we’re here to guide you every step of the way.
That’s why we offer a 14-day money-back guarantee with a little twist:
If you follow the program, do the exercises, and still can’t produce a single overtone after 14 days — we’ve got you covered.
Before we process a refund, Anna-Maria will personally meet with you for a short Zoom session to see what’s going on.
In 99% of cases, it’s just a small adjustment or misunderstanding — and we’ll help you get there.
But if it truly doesn’t work for you after that, you’ll get a full refund. No hard feelings, no weird vibes — just honesty, care, and your money back.
Because this method works — and we want it to work for you.
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