Johan Rooze studied Piano and Conducting at the Utrecht Conservatory, the Netherlands. Later he went to the U.S. to specialize in Jazz Piano, Singing and Arranging.

He was founder and 23 years Musical Director of the Utrecht University Vocal Group “Dekoor”. They won many prices such as The Dutch Choir Festival, The International Vocal Group Festival and the “Idols for choir” TV show, “Korenslag” 2007 in the Netherlands. He was Conductor of the Utrecht Student Symphonic Choir and Orchestra. With these choirs he toured all over the world. Johan Rooze founded the “Dudok-Ensemble”, an outstanding Project Choir, conducted the monthly Bach Cantatas in Utrecht and was guest conductor with the National Radio Choir.

Furthermore he was Professor for Vocal Jazz, Conducting and Arranging at the Conservatories of Rotterdam and Alkmaar, a member of the board of Musical Advisors for the Dutch Royal Christian Music Association and Artistic Director for the International Choir Festival, Netherlands 2005.

In 2008 he moved to South Korea and teaches Choral Music and Jazz Piano at the Yeongnam University. He is musical director of a new Jazz Choir (Yaenoeul Jazz Singers) and in 2010 he founded the professional Daegu Students Choir. He is a frequent guest conductor with other choirs. Besides his choral work he is very active as a Jazz Pianist and Arranger. He works as Artistic Director for INTERKULTUR and is a frequently asked adjudicator, speaker and workshop-leader internationally.

Ralf Eisenbeiß was born in 1952 in Zeulenroda. After his secondary school examination he studied pedagogy, German philology and musical education. He received his PhD in 1979 at the Pedagogical University of Zwickau. From 1978 to 1981, he studied choir and orchestra conducting at the Franz Liszt Conservatory in Weimar.

Ralf Eisenbeiß was working as the director of the choral department at the Pedagogical University in Zwickau and appointed professor for choir conducting and choral singing in 1987. He was conductor of the renowned Pedagogical University Zwickau Choir. With his choir he performed a wide repertoire of compositions for a cappella choirs and with orchestra, too. Under his direction the choir won numerous prizes at national and international choir competitions.

Ralf Eisenbeiß was lecturer at the central seminar for choral conductors in Berlin and organized numerous workshops himself. He often appears as guest conductor at home and abroad. Since almost 30 years he works as artistic director of INTERKULTUR. Ralf Eisenbeiß is founder of the Int. Robert Schumann Choir Competition in Zwickau and one of the founders of the World Choir Games. Since 1992 he was responsible for more than 150 international competitions of INTERKULTUR in Germany, Italy, Korea, Indonesia, China, Austria, Spain, USA and other countries. Ralf Eisenbeiß is very often invited as a juror in national and other international choir competitions all over the world.

Explorer of the human voice, compassionate and inspiring teacher, Tobias Hug has been singing, teaching, travelling for 20 years and is deeply involved with the international choral, beatbox and a cappella scene.

He currently performs with his group ‘Beatvox’, the World Beatbox Team Champions ‘The Beatbox Collective’ and is in high demand as a teacher, adjudicator and coach. A speciality of his is working with and promoting Loop Stations through his ‘Vocaloops’ community.

With the choir ‘London Voices’ he has contributed to countless movie soundtracks (The Hobbit, Interstellar).

From 2001-2012, Tobias sang with Grammy-Award winning a cappella group The Swingle Singers. As their bass and vocal percussionist he was part of seven studio albums, and performed more than 700 concerts.

Tobias is a vocal entrepreneur, co-founding and acting as Artistic Director for many a cappella festivals (e.g Vocalmente, London A Cappella Festival) and, in 2017, co-creating the Worlds Largest Beatbox Choir (6500 children in Hong Kong), entering the Guinness Book of Records.

He holds a Master in Rhythmic Choir Conducting and Vocal Leadership from the Royal Academy of Aalborg.

Branko Stark (1954), composer, choral director and voice teacher, is a teacher at the Arts Academy (University of Split-Croatia) where he teaches vocal technique, singing and acting voice. He has written over two hundred compositions for which he is the recipient of numerous awards.

His speciality is voice theory and its scientific-pedagogic research and works published on this subject. He holds seminars, masterclasses, lectures and workshops for choral conductors and singers worldwide (Argentina, China, Slovenia, Denmark, France, Great Britain, Malta, USA, Korea, South Africa, Iran, Malaysia, Indonesia, Thailand, Sri Lanka, India, Hong Kong, Philippines, Singapur, Brunei, Latvia, Russia, Czech Republic, Spain).

Mr. Stark is also a prominent adjudicator for many international choral competitions (Germany, Austria, Croatia, China, Japan, Indonesia, Malaysia, Latvia, Italy, Czech Republic, Sri Lanka, Korea,).

He is President of the Croatian Choral Directors Association, leader of the Vocal Academy, and a member of the International Council of the World Choir Games.

Walter Lo Nigro was born in Trieste in 1957, where he received his piano diploma at the Tartini Conservatory. Later he obtained a choir conducting diploma and also attended advanced courses in Fiesole with Georgi Robev and Samuil Vidas. From 1986–88 he enrolled in the orchestra and choir conducting master classes at the Mozarteum in Salzburg. In 1984 he successfully founded the choir „Accademia Musicale Universitaria di Trieste“, which under his direction received important awards in several national and international contests (Gorizia, Arezzo, Tours, etc.). Walter Lo Nigro was piano assistant at the „Festival dei Due Mondi“ in Spoleto and choirmaster at the opera festival in Saint Céré. He also worked as a piano assistant and choirmaster in the opera theaters of Trieste, Venice and Ljubljana. He taught at the Conservatories of Verona and Castelfranco Veneto, and at present in Avellino. In November 1990, he became the conductor of the Obala Choir of Koper attaining accolades and awards as best conductor in several international competitions (Maribor, Richnov nad Kneznou, Riva del Garda, Zadar).