The GROSSMÜTTERCHEN (means “Grandma”) HATZ & KLOK is a humorous "Worldjazzfolkskapop-Quintet". Their influences are drawn from Klezmer, Balkan Folk, Latin American and from classical music. Their debut album "Gallato" was presented at the International Klezmore-Festival 2011. Since spring 2016 they tour with a new 5 piece line up.

Combine virtuouso musicians who have played with Randy Brecker, Dean Bowman and for Shantels Bucovina Club Orkestar or the Sandy Lopicic Orkestar amongst others, dance tunes and passion for playing … the audience loves this “cocktail”.


Nomination of their debutalbum GALLATO by the jury of the German Record Awards.

Concerts - Opening of "Wiener Festwochen", International Accordion Festival Vienna, Klezmore Festival Vienna, B-flat Jazzclub Berlin, Generaldirektion and Stadtfest Graz (A), Jazz & the City Festival Salzburg (A), The Montmartre-Festival Vienna and many more.

Media profile - Appearance at Austrian radio stations - (Jazztime - Ö1, Trost und Rad - Radio Wien, etc...), Appearance at international radio stations (Radio Warschau (2013), Radio Helsinki (2011), Hessischer Rundfunk Rodation), Appearance on Austrian TV (ORF, Servus TV and GO-TV) 

Awards - AUSTRIAN WORLD MUSIC audience AWARD 2015


A musical meet-up that raises high expectations. With “Grossmütterchen Hatz” and “Trio Klok” two formations have found together, that are already well known to connoisseurs of the local (Austrian) world music scene (…) they are two of the most remarkable and in the past years also most successful representatives of global sound in Austria.
(musicaustria, Michael Ternai 2017)


The GMH Orkestar played a cocktail of jazz inspired by WORLD music, with Franziska Hatz on vocals and accordion. Her enthusiasm for their music encouraged some members of the audience to dance towards the back of the stands. GMHO’s music showed, more obviously than anywhere else, in the festival how expansive the jazz genre truly is.
(International Jazz Festival CAIRO, 2013)


Franziska Hatz: accordion, voice
Richie Winkler: saxophon, clarinet
Roman Britschgi - double bass
Jörg Reissner - guitar
Saša Nikolic - drums



Worldwide except Great Britain and Ireland.