Singing the overtones of our voice:

Method 4L


Workshop given by: Giovanni B. Bortoluzzi


Recognizing and controlling the harmonic overtones in our voice,
is what we call“Overtone Singing”.

Harmonic overtones are pure, in perfect mathematical relationship with each other and with the fundamental tone that generates them.

Having as a basis a good speaking voice, it is possible to amplify these harmonics, making them clearly audible.

There are many different styles and techniques, which can be grouped in
two main families: overtone singing and throat singing.
Overtone singing techniques are based on the regular speaking voice, while Throat singing techniques uses both true and false vocal folds, to create different timbres.


The most important requirement is listening. As a matter of fact, having an attentive hearing attitude is the best way to become an overtone singer.




  • Warming up exercises
  • Listening exercises. Relation between vowels and harmonics.
  • Practical demonstration of my METHOD 4L® as it follows:

L0: finding the timbres that amplify the overtones of our voice.
L1: amplifing the overtones in ascending and descending order
L2: making melodies with one fundamental tone
L3: making melodies while moving the fundamental tone


  • Learning the main techniques:


▫Switching correctly between the “hidden” vowels

▫Everything you need to know about the L-technique

▫Activating the false vocal folds, rawly and euphonically.


  • Basics of Cantu a Tenore(Sardinian throat singing)
    and Tuvan Khöömei (Tuvan throat singing)
  • Kargyraa/Bassu voices
  • Khorekteer/Contra voices
  • How to sing in choir: the Sardinian choral tradition explained.
  • 5 main styles of Tuvan throat singing explained
  • Questions and answers.




Giovanni B. Bortoluzzi was born in Italy in 1987. He began his musical journey in 2006, by learning to play drums, bass and guitar with local blues bands. Shortly after, he started being attracted by the sound of the harmonic overtones. Since 2013 he’s been studying and researching in the field of overtone singing, with particular dedication to the Tuvan styles and melodies. In 2015 he created the Method4L, a didactical tool designed for improving the control of the overtones in the human voice. In 2017 he moved in Sardinia to learn the tradition of Cantu a Tenore, also known as Sardinian Throat Singing: during these years, he joined a research team that analized the movements inside of his larynx, using laryngostroboscopy and real-time MRI. This research focused on the western overtone singing techniques, with a special analysis on the tuvan style “ezengileer”. It has been presented in Kracow in 2019, and then published in 2020 on TheJournalOfVoice.

In 2023 he got the award “for mastering the kargyraa technique” during the 8th International Etnomusicological Symposium “Khoomei, a cultural phenomenon of the peoples of central Asia”. In 2024, he published his first book “cantare gli armonici: il metodo 4L”.
Nowadays, he’s a very popular overtone singing performer, especially for the tuvan style “Kargyraa”, and also one of the most requested teachers.