During the 1980s, in Lyon, he performs with jazz bands as well as with pop-music bands, African musicians, dancers... He also discovers free improvised music. He then joins ARFI, La Marmite Infernale, Yves Robert … Then there are the Jazz Festivals in Vienne and " Rive-de-Gier", the jazz club "Via Colomès", and also the music library where he discovers the Bibayak Pygmies (wonderful Ocora discs!) and all kinds of jazz music.

In 1989, Hubert Dupont settles down in Paris and immediately starts studying with J.-F. Jenny-Clark, who will have a lasting influence on his music: an amazingly talented instrumentalist, J.-F. Jenny Clark had a unique personal sound, an original approach to improvised music, a great wealth of musical ideas, and thus the highest technical demands.
Hubert meets up with former friends for frequent jazz sessions and club dates, with Allan Jones, François Théberge, Julien Lourau and many others. In 1989, Paris is the place where modern African music is happening, with famous bass and drums players; it's also the meeting place for jazz musicians from all over the world, for those looking for an original way of playing where everything is possible, everything is still to be discovered and explored: Dave Holland and Steve Coleman are the best examples of this.

In 1990 he meets Guillaume Orti, Benoît Delbecq, Benjamin Henocq, and together they form a band that will be known as KARTET, and which will spend a year in Marseilles as a resident band: this provides him with a unique opportunity to devote himself entirely to a demanding yet exhilarating collective research adventure… an original sound, "an adventure of the imagination" … the wonderful drummer Chander Sardjoe joins the band in 1996 … in 2007 the fifth CD "The Bay Window" is released, on Songlines

In 1991 Hubert begins collaborating with Quoi De Neuf Docteur (led by Serge Adam): five discs, many concerts… and becomes a very in-demand sideman; he has the pleasure of playing with Robin Eubanks, Harold Land, Glenn Ferris, George Brown, Tommy Smith, Alain Jean-Marie, Laurent De Wilde, Red Holloway, Deborah Brown, among others, at the Club La Villa …
But also with Steve Lacy, Stefano Di Battista, François Thuillier, Antoine Hervé, Philippe Sellam, Jean-Christophe Cholet, Mathias Rüegg, Paolo Fresù, Mathieu Michel, Claudio Pontiggia, Michael Arbenz, Wolfgang Puschnig, Gabor Gado, Etienne Brunet, Louis Winsberg, François Merville, Marc Liebeskind, Steve Potts, Yannick Rieu, Olivier Ker Ourio, David Patrois, Vancouver Improvisers' Collective...
And Norbert Lucarain, Geoffroy de Masure, Brice Wassy, David Venitucci, Nicolas Genest, Christophe Marguet, Pierre-Olivier Govin, Didier Haboyan, Sébastien Texier, Daunik Lazro, Noël Akchoté, Steve Argüelles, Hasse Poulsen; and from the Belgian jazz scene: Fabrizio Cassol, Antoine Prawerman, Stéphane Galland, Pierre Van Dormael, Laurent Blondiau, Michel Massot, Gianni Gebbia, Stefano D'Anna, Bertrand Denzler …

In 1993, Hubert Dupont co-founds Hask Collective with his friends from KARTET and some others, concerned by the necessary independence of artists, from the creative process (through their productions) to the audience... (in the manner of Arfi, M-Base, Aacm…) . A fantastic shared tool; an Independant Republic of Hask … an 'ear attitude' as Delbecq wrote in the fanzine " La Nébuleuse du Hask ".
Hask participates in animating the famous club 'Les Instants Chavirés'; improvised meetings, but also bands which are going to last…
In 1993 Hubert creates the children's show 'Animal Chorus' with his trio and the Mime Daniel; in 1996 he produces the music for the cartoon 'La Taupe et la Taupe' by Spinga and Olivier Esmein.

He founds and leads ALTISSIMO (1994-99), with Guillaume Orti, Philippe Sellam, Didier Haboyan, Pierre-Olivier Govin (but also Fabrizio Cassol, Sébastien Texier) playing alto saxophones, and Christophe Marguet playing drums,

then DECOR (1996-2000) where he plays electric bass, with Geoffroy de Masure (trombone), David Venitucci (accordeon), the Cameroonian Brice Wassy (drums) and also Nicolas Genest, Stéphane Payen, Franck Vaillant. These bands were lucky enough to record on the Pee Wee label (Vincent Mahey) and performed at many festivals.

In 1996, Stéphane Payen founds THÔT, and asks Hubert to play electric bass with Gilles Coronado (guitar), and Christophe Lavergne (drums). Here again - and thanks to Stephane Payen's special music and the collective playing style that accompanies it - the exuberant band lives out its unbridled adventure before a large audience. The original band is involved in Thôt Agrandi, then Thôt Twin, then performs with slammers Felix and D'...Then Thôt joins Fode Diop Sabar Group and Ivan Ormond and creates the SABAR RING (premiere in St Louis du Senegal, then Banlieues Bleues Festival 2007...)

Outside jazz, Hubert performs with SABREEN, the group of the Palestinien singer Kamilya JUBRAN, with Nabil KHALIDI (oud / Maroc), Toufic FARROUKH (sax / Lebanon), Pierre RIGOPOULOS (zarb)...

In 1998-99, he explores with his electric bass the possibilities of new improvised electronic music (different effects, sampler...), and organises the Festival de la Nébuleuse Hask at the Club Le Cithea, the first of a series, until Hask Collectif is disbanded in 2004.

Since 2000 he has been performing or recording with the following bands:

- HATI, Nicolas GENEST's band (trumpet, flugelhorn) with Prabhu EDOUARD and Philippe FOCH (tablas, perc.), Michel GUAY (sitar), Malik MEZZADRI (flute), Stefanus VIVENS (Harmonium, keyboards).

- David Venitucci's Trio (accordeon), with Antoine Banville (drums)

- The Cameroonian drummer Brice WASSY's KÙ JAZZ GROOVE: with Hervé SAMB (guitar), Jean-Jacques ELANGUE (sax), Don-Dieu DIVIN (piano), Guy NWOGANG, Denis TCHANGOU, XUMO (perc., drums)

- The singer MARJOLAINE REYMOND : with Yvan ROBILLIARD (piano) & Eric Groleau (drums)

- Elie Maalouf Oriental Jazz, of the lebanese pianist, with Youssef HBEISCH (perc./Palestine), Joshua LEVITT (ney, sax / Israël)...

- AL FUNDUQ, launched by Pierre VAIANA (sop sax) in 2006, with Carlo Rizzo (tambourins), Zoumana Dembélé (djembé, tama), Fabian Fiorini (piano)

Around 2002 Hubert starts a new composition cycle and has new projects as a leader:

- solo (double bass); CD Ultraboles released in 2005 (UBR 0501 / Nocturne);

- in 2004, he founds DUPONT T, with the young pianist Yvan Robilliard, and the drummer Chander Sardjoe. In 2006, indo-new-yorker saxophonist Rudresh Mahanthappa joins the band for the CD Spider's Dance (UBR 0502 / Nocturne)

- in 2005 he founds CRONO CROMO, dedicated to improvised electronic music, with Stéfanus Vivens playing keyboards, computer, sampler.

- in 2005 he founds NIGMA-E, dedicated to improvised electronic music, with drummer Eric Groleau.

" The best is yet to come… "