Kadar studied with Christian Lauba in Bordeaux and later with Theo Loevendie at the conservatorium in Amsterdam. In his Oeuvre, there are about two hundred pieces for most instruments including a book for piano (Der Virtuos), a book of songs for baritone voice and piano based on poems in German, Hungarian and French, a small theater piece (Cyrano) and a Concerto for violin and orchestra (Aede). Most of his works have had public performances at different festivals all over the world, for example, Mahler festival in Budapest, Ireland, Japan, USA, Salzburger Festspiele.
As a singer and chansonnier, he is, next to his work as a soloist, performing together with the Budapest Festival Orchestra in an opera of Iván Fischer or with different groupes. Until 2014 he was part of the Trio Trio de Passage together with saxophonist Hester Cnossen and puppeteer Feike Boschma.
In 2016 his new composition on Casanova will be performed by himself as a soloist and the ensemble of the Ij-Salon consisting mainly of players of the Concertgebouw Orchestra. In 2015 his composition Peintures for the David Kweksilber Bigband and Leo van Oostrom as a saxophone soloist was performed at a Jazz Jubilee in Arnhem and in the Bimhuis in Amsterdam. In 2014 his composition for orchestra Lebam commissioned by the NSO orchestra and the Dutch Performing Art Funds was performed in the 10 great halls of The Netherlands including the Concertgebouw of Amsterdam. From 2012 to 2014 he has performed as a soloist singer with dance groupe LeineRoebana in the production NexT.
In 2012 he gave in the Netherlands a number of concerts together with the Dutch Chamber Choir for which he composed and arranged the hole program and was invited to perform as a soloist and presentator.
At the National Remembrance Ceremony of the 4th of May 2009 in the Nieuwe Kerk in Amsterdam in the presence of H.M. the Queen of the Netherlands, H.R.H. the Prince of Orange, H.R.H. Princess Máxima, government officials and members of parliament, two compositions of his for women quire and tenor solo were performed: Is dit een mens on a text by Primo Levi in the translation of Jan van der Haar and Navertellen on a text by Wim de Bie. These compositions were commissioned by the Nationaal Comité 4 en 5 mei of the Netherlands.
He has written works for the Budapest Festival Orchestra conducted by Iván Fischer, Stichting het 20ste eeuwse lied, the Leo Smit Ensemble, the Oh-Ton Ensemble (Germany), the Nieuw Ensemble, Het Trio, the Hexagon Ensemble, the Ricciotti Ensemble, the Nationaal youth choir of the Netherlands, the Nederlands Kamerkoor, for Harry Sparnaay, Annelie de Man, Arno Bornkamp, Masumi Nagasawa, Reinild Mees, Irene Maessen, Thomas Oliemans, Roger Braun, Ralph van Raat, Klárá Würtz, József Lendvay, Iván Fischer and Isidor Lateiner.
Fou for tenor and soprano saxophone (1996)
Histoire d' une fourmi, sa vie, ses rencontres… for clarinet (1996)
Polyprimates for flute (1996)
Pronto for piano (1997)
Mr. Parfum for violin (1997)
Centre Gronder De l' Alto for alto violin (1997)
LF AN dit Ga for bass trombone (1997)
lf an dit. .. for bass trombone (1997)
Hum... us for alto saxophone (1997)
Ioma for soprano saxophone (1997)
Ouwar I for alto saxophone to be played with some improvisation (1997)
Ouwar II for alto saxophone to be played with some improvisation (1997)
Ouwar III for alto saxophone to be played with some improvisation (1997)
Poh for electric guitar (1997)
Ver de terre for alto violin (1997)
Monstre for bariton saxophone (1997)
Solemacotnahpelepocoppih en em soselsapessac et merignac; te…cangirem !!Eh!..Hub!!? for alto saophone (1997)
Haha! for piano (1997)
Voyages for alto saxophone (1997)
XAP for bass clarinet and cello (1998)
Blowing up for bass clarinet (1998)
Soulage for alto recorder (1998)
L'arbre for pan flute (1998)
Histoire d’ insectes for cembalo (1998)
Les humeurs de Mr. K for piano (1998)
Vivent les puces ???, etude for saxophone alto solo (1998)
Le fleuve for saxophone alto (1998)
Chhhh-t for soprano saxophone (1999)
Iomaeleneiloc d’ vizlifan belonging to the d' vizlifan suite (a suite of 4 pieces for different instruments) for piano (1999)
Π a-llume for piano (1999)
Ihrpsa for harp (1999)
a2viz
Le KAJT for cello (2000)
D' vizlitrip for bass clarinet (2000)
LV'L for bass trombone (2001)
Der Virtuos, ein Neujahrskozert a book for piano on drawings and text by Wilhelm Busch containing 7 pieces (2001) where each part can be played separately.
Une humeur de K. For Cembalo (2001)
O etude for alto saxophone (2001)
Chl for cello solo (2002)
S- Limericks-s for voice and cembalo (2002)
Riverside’s life, live for piano (2002)
Auror in 4 movements for organ (2004)
Promenade for piano (2005)
57 pieces pou violon seul for violin (2005)
Toi... Toi... k for duduk (2006)
5 kis miniatures for Tarogoto/ Taragot (2006), 5 small pieces
Hauch for piano (2006)
Chant ch'ant for two alto saxophones (1997)
Dubbel Π with 'hindt for bass clarinet and cembalo (1998)
Mal- entendu?? for alto saxophone and cello (1998)
Faire mouche for guitar and cembalo (1998)
Note-assis for alto saxophone and computer animation, interaction with the public (1998)
Hans huckebein, der Unglucksrabe with text by Wilhelm Busch for Mezzo-soprano and piano (1998)
A hindt for mandoline and guitar (1998)
Les aventures de Mr. Guy Tarre et Mr. Poelle for pan flute and guitar (1999)
Erunois d’ vizlifan belonging to the d' vizlifan suite (a suite of 4 pieces for different instruments) for vibraphone and piano (1999)
Kadjar for Gamelan and Kadjar (1999)
Das grosse Lalula Reid for spoken voice and alto saxophone (1999)
Hatoui for 2 tenor saxophones (2000)
Lettre a unami for violin and alto saxophone (2000)
Kangourou Fantasie for flute, cello and piano (2001)
Ah, muses! for mandoline and guitar (2001)
O etude for alto saxophone (2001)
Etanos Niamay for alto violin and percussion (2002)
Ami d' Ima' for cello and piano (2002)
Levent for bass clarinet and organ (2002)
En passant for soprano saxophone and piano (2003)
Liederbuchlein a book of songs with three cycles for bariton voice and piano and 1 cycle for mezzo- soprano voice, tenor voice and piano (2003)
6 deutsche Gedichte German cycle for bariton voice and piano (2003)
Nachtlied
Nahe des Geliebten by Goethe
Mein Jettchen by H. Von Kleist
vergiss mein nicht by Novalis
Todesfuge by Celan
Petofi Harom Vers Hungarian cycle for bariton voice and piano (2003)
ma egy eve
mit ettel fold
szeretlek kedvesem by Sándor Petőfi
Le dernier jour d’un condamne French cycle for baiton voice and piano with texts by V. Hugo from his novel with the same title and one poem Silence (2003)
H. Heine, 4 Gedichte German cycle for mezzo- soprano voice, tenor voice and piano(2003)
Liebste
Warum?
Sie haben mich gequalet
Nacht lag auf meinen Augen by Heinrich Heine
Fantome- Pensee a vous- Fantome for C- melody saxophone and piano (2003)
Dieu qui sourit (text: V. Hugo) for guitar and voice (2005)
Ecrit sur le tombeau d'un petit enfant (text: V. Hugo) for guitar and voice (2005)
A une femme (text: V. Hugo) for guitar and voice (2005)
Oh! Quand je dors (text: V. Hugo) for guitar and voice (2005)
L'albatros (text: C. Beaudelaire) for guitar and voice (2007)
Les corbeaux (text: A. Rimbaud) for guitar and voice (2007)
Lopage for alto saxophone and piano (2007)
Un poème for harp and harp/voice (2007) in three parts with 'Allerseelen' (text: Hermann von Gilm) for harp and mezzo-soprano (2007)
dors (text: M. Kadar) for guitar and voice (2008)
szin vert for tárogató and double bass (2008)
szin bleu for tárogató and double bass (2008)
Setanos for alto saxophone, alto violin and piano (1996)
E... eve... e... reve for flute, bass clarinet and piano (1997)
Iemarkons. ..iemarkons for bass recorder, bass and marimba (1999)
D-bout for bass clarinet, marimba and piano (1999)
Iomaesagnoitat d’ vizlifan belonging to the d' vizlifan suite (a suite of 4 pieces for different instruments) for flute, alto saxophone and piano (1999)
Pan-C de K. for alto flute, alto violin and harp (2001)
De Teltsebeam for voice or tape, C-melody and soprano saxophone, piano on poems by Diet Huber (2005). Each piece can be played separately:
de Fiter-iter
twa roazen
Luzeleafde
Widsesankje van in flie
De bezem en de boender
Halsaora' for clarinet, cello and piano (2007)
Ataccot pour les nerveux for saxophone quartet (1997)
Respiration sous l'eau for recorder quartet (1997)
C'est a nos deux os for alto saxophone, two bass recorders and piano (1997)
Quatuor a cordes for string quartet (1998)
Versans for clarinet, violin, cello and piano in 5 movements (2004)
Of mice and men for I: soprano saxophone, horn in F, trombone, electric guitar, II: 2 piccolo flutes, trompet, tuba, percussion, piano, III: baritone saxophone, horn in F, trombone, bass guitar (1996)
Le petit prince for string octet (1997)
Ratquiem pour des insectes for 5 strings and 5 saxophones (1997)
De sacre types for flute, hobo, bass clarinet, mandoline, guitar, harp, piano, percussion, violin, alto violin, cello and bass.(1998)
Ferelnoix d’ vizlifan belonging to the d' vizlifan suite (a suite of 4 pieces for different instruments) for flute, oboe, clarinet, bass clarinet, bassoon, 2 horns in F, bass trombone, harp, piano, percussion, tenor saxophone, 2 violins, alto violin, cello, bass (1999)
d' vizlifan suite a suite of 4 pieces for different instruments for flute, oboe, clarinet, bass clarinet, bassoon, 2 horns in F, bass trombone, harp, piano, percussion, tenor saxophone, 2 violins, alto violin, cello, bass (1999)
Histoires courtes for tenor recorder, bass clarinet, alto saxophone, accordion, harp, guitar, bass (2000)
Translifan for saxophone ensemble (2 sopranos, 3 altos, 4 tenors, 2 baritons and 1 bass) and piano (2000)
Poemes de Ronsard in three movements on a text by Pierre de Ronsard (2000)
mignonne, allons voir. .. and * Je n'ai plus que les os
Cyrano, last act of the theater piece by Edmond Rostand titled Cyrano de Bergerac for soprano voice, baritone voice, C Melody saxophone, violin, alto violin, cello and piano. (2001)
Dieu qui sourit on a poem by Victor Hugo for spoken voice, flute, mandoline, guitar and harp (2001)
Oh! quand je dors on a poem by Victor Hugo for spoken voice, flute, mandoline, guitar and harp (2001)
autre guitare on a poem by Victor Hugo for spoken voice, flute, mandoline, guitar and harp (2001)
Chant de poisson in three movements for flute, clarinet, basset horn, bassoon, horn in F and piano (2003)
Vandaag een jaar geleden for soprano, flute, clarinet, violin, cello, percussion, piano on text by Sándor Petőfi translated into Dutch by S. Baracs (2004)
Aan het eind september for soprano, flute, clarinet, violin, cello, percussion, piano on text by Sándor Petőfi translated into Dutch by S. Baracs (2004)
De sterrenhemel for soprano, flute, clarinet, violin, cello, percussion, piano on text by Sándor Petőfi translated into Dutch by S. Baracs (2004)
De eekhoorn en zijn vrienden. De olifant, de paradijsvogel, de waterjuffer for spoken voice, alto saxophone, violin, piano and percussion (2004)
Goethe Rilke Celan, 5+1 Gedichten for girls youth choir in 6 movements (2005):
Wandrers Nachlied
Der Zauberlehrling by Goethe
Meeresstille by Goethe
Maitag by Rilke
Wandrers Nachtlied by Goethe
der Tod by Celan
Encore et toujours on the texts of the correspondance 1951-1970 by Paul Celan and Gisele Celan Lestrange (editions du seuil) for soprano voice, clarinet, violin, cello and piano (2006)
L' oeil for string quintet (2007)
Plume for string quintet(2007)
L'albatros (text: C. Beaudelaire) for string quintet and voice (2007)
Les corbeaux (text: A. Rimbaud) for string quintet and voice (2007)
Poèmes de Paul Celan for the Nederlands Kamerkoor (2007)
Spät und tief by Paul Celan for the Nederlands Kamerkoor (2007)
Corona by Paul Celan for the Nederlands Kamerkoor (2007)
Sprich auch du by Paul Celan for the Nederlands Kamerkoor for tenor solo(2007)
Stimmen by Paul Celan for the Nederlands Kamerkoor (2007)
Tenebrae by Paul Celan for the Nederlands Kamerkoor (2007)
Blume by Paul Celan for the Nederlands Kamerkoor (2007)
Ein Holzstern by Paul Celan for the Nederlands Kamerkoor for bass solo(2007)
Stehen by Paul Celan for the Nederlands Kamerkoor (2007)
Es wird by Paul Celan for the Nederlands Kamerkoor (2007)
Der Tod by Paul Celan for the Nederlands Kamerkoor (2009)
Is dit een mens by Primo Levi for women choir and tenor solo (2009)
Navertellen by Wim de Bie for women choir and tenor solo (2009)
Brut for Orchestra (1998)
Rrrh. .. for orchestra (1998)
Shhht for orchestra
AEDE for violin and orchestra (2001)
le vol en D for flute orchestra (2001)
Merimes for Tarogato, string orchestra and vibraphone (2006)
Rêve for Tarogato and string orchestra (2007)
Konijn en Maan (rabbit and moon) for flute, saxophones and tárogató (2008)
a concerto for cello for Peter Szabó, first cello of the Budapest Festival Orchestra
a composition for piano and cello for Peter Szabó
a piano solo for the fortepiano made by Gijsbregt Wilderom in Amsterdam
a piece for children choir for the Dutch national children choir
a composition for tenor and baroque ensemble for Marcel Beekman
