A native of Chalkida, Greece Ioannis Kalantzis obtained a diploma of classical guitar with Evangelos Asimakopoulos at the National Conservatory of Athens. He studied music theory and composition with Yannis Ioannidis at Nakas Conservatory and electroacoustic music with Henri Kergomard at KSYME in Athens.
He continued his studies of composition and computer music at the Conservatoire National Supérieur de Musique of Lyon, France with Philippe Manoury, Marco Stroppa, Dennis Lorrain and Robert Pascal (diploma DNSM with distinction).
He also attended master classes with Phillipe Schoeller, Allain Gaussin, George Crumb, Klaus Hubert, Peter Eötvös, Gerard Grissey, Ivan Fedele, Michaël Lévinas, Jonathan Harvey, Gilbert Amy, Michael Jarrell, Francois Bayle, David Wessel, and Miller Puckette.

He has received:

."Honorable mention" in the II International Electroacoustic Music Contest of Sao Paulo (CIMESP 1997 Brazil).
.2nd Price in the National Composition Contest "Papayioannou" (Athens, Greece 1998).

.Finalist in the II International Computer Music Competition Pierre Schaeffer 1999 (Pescara,Italy).

.Finalist in the International Electroacoustic Music Contest Art's 2001 (Valencia, Spain).
.Laureate of the Grame/EOC Composition Contest 2002 (Lyon, France).

.Finalist in the International Electroacoustic Music Contest Miniaturas Electroacusticas 2008 (Andalucia)

His work has been selected for the official concerts of the International Computer Music Conference (ICMC'99 Beijing, China), (ICMC 2001 Havana,Cuba),(ICMC 2003 Singapore),(ICMC 2005 Barcelona, Spain), (ICMC 2007 Copenhagen, Denmark).

His pieces has been performed worldwide in many other international events as:

Cambridge Digital Arts Festival (CDAF '99 England).

Australian Computer Music Conference ACMA '98, 2008 (Fitzroy, Sydney Australia)

III International Biennial for Electroacoustic Music of Sao Paulo (BIMESP 2000, 2008 Brazil).

Festival Acousmatique International «L'espace du son 2001» (Bruxelles, Belgium).

Seoul International Computer Music Festival 2001, 2002 (SICMF, Korea).

11th Annual Florida Electrocacoustic Music Festival 2002 (USA).

Unbalanced Connection concerts 2002 (University of Florida, USA).

International Youth Music Forum 2003 (Kiev, Ukraine).

"Primavera en la Habana" Festival International de musica electroacoustica 2004, 2008 (Havana, Cuba).

Biennale d'Art Contemporaine de Lyon 2003

4th Annual Electroacoustic Music Festival 2004, Santiago (Chile).

The San Francisco Tape Music Festival 2005 (USA).

CIME Electroacoustic Music Festival 2006 (krakow, Poland)

4th Sound and Music Computing Conference 2007 (Lefkada, Greece)

Santa Fe International Festival of Electroacoustic Music 2007 (New Mexico, USA)

North Carolina Computer Music Festival 2008 (Raleigh NC, USA)

CIME Electroacoustic Music Festival 2008 (Valencia, Spain)

Electromediaworks Festival 2008 (Athens, Grecece)

5th Sound and Music Computing Conference 2008 (Berlin, Germany)

FrammentAzioni Festival 2008 (Udine, Italy)

ÉuCuE xxvii - 2008 (Montreal, Canada)

He had commissions from the Athens Concert Hall, the National Centre of Music Creation of France (Grame) and the Ministry of Culture of France.
He is founding member of the Hellenic Electroacoustic Music Composers Association (HELMCA).
His work has been released on CDs by UNESP/FASM (Brazil) and PeP/CEC (Canada).