Here are some excerpts from my musical career:
solo
Katz improv!
Since 2019 I’ve done and recorded a number of improvised and interactive concerts. A selection of these instant compositions/improvisations is released on album “Katz improv!” (Presence Records) on November 8th 2024.

bands and collaborations
New Ro 2025–
Emma Klingenberg 2024–
Mia Hafrén 2022–
The Heartbeat Band 2014–
SoulSisters 2005–
Lisa G 2022–
Mr.Fastfinger
Jazz Group Morango 2006–
(Katz–Törnroos–Iivanainen)
East Newland Trio 2008–
(Katz–Törnoos–Tiittanen/Snellman)
Kurkirku 2006–2010
Jazz Emma Nominee 2007
Staufenbiel Brothers 2000-
(Otto Staufenbiel: harmonica/Paul Staufenbiel: harmonica, synth, drums/Kalle Katz: drums, synth)
Creamstar 2000–2005
theatre and choir compositions
Svenska Teatern
Teatercafé 2021
Teatercafé was an online streaming collaboration project between Svenska Teatern, Wasa Teater and Åbo Svenska Teater during the pandemic. I worked as a composer and a live musician.
tanssiARTesaani
A modern dance performance: NoCore 2019 (choreography by Beniamino Borghi)
Finlands Svenska Ungdomsförbund
- Bränd / Burned youth musical 2016 (directed by Lauri Vennonen)
demo tapes performed by yours truly:
Eldflugorna / Fireflies
Eldens sång / Fire’s song (Lyrics Lauri Vennonen)
- Riskzon / Riskzone youth musical 2013 (directed by Simon Bergman)
Kuopion Kaupunginteatteri
Musical play Sielun rippeet /Leftovers of the Soul 2007 (directed by Kari Paukkunen)
* clip coming soon *
Loviisan Teatteri
Päällystakki / Overcoat 2026 (directed by Laura Järviluoma)
- Akakin teema / Akaki’s theme demo by yours truly:
Musical play Naisen kassit 2020
Children’s Musical Kultasiskoni / Most Beloved Sister 2014 (directed by Dunja Katz)
- Kalabaliikki / Tumult song’s demo tape by yours truly and singer Fanni Fagerudd, lyrics by Liisa Ryömä (from Kultasiskoni):
Zombie Musical Kauhujen kenttä / Field of Horrors 2012 (directed by Markku Arokanto):
- Samaeri / Samedifferent song’s demo tape by yours truly, lyrics by Liisa Ryömä (from Kauhujen kenttä):
- Sana kerrallaan / One Word at a Time song’s demo tape by yours truly and singer Mirella Pendolin (from Kauhujen kenttä):
Children’s Musical Play Lumikki ja seitsemän kääpiötä / Snow White 2005 (directed by Markku Arokanto)
Lahden Kaupunginteatteri
Everstin nainen / Colonel’s Woman 2003 (directed by Lasse Lindeman)
* clip coming *
Kansallisteatteri
Mies se on vainajakin / Even a Dead Man is a Man 2002 (directed by Juha Kandolin)
* clip coming *
Loviisa Contemporary
Choir performance: Niin metsä vastaa / So the Forest answers 2020 (directed by Kati Rapia)
https://issuu.com/peakpress/docs/pikkukaupunki_talvi_21-22_issuu/s/14098362
Loviisan valituskuoro / Loviisa Complaints Choir
Conducted by Mirella Pendolin, 2025
other stage work
Kotkan Kaupunginteatteri
Pianist: Sataman kaupungin laulu (conducted by Jouni Bäckström, directed by Kalle Kurikkala)
Lovisa Operaförening
Pianist: New Year’s Show 2019, 2020, 2022, 2023, 2024, 2025
Conductor, pianist, arranger, composer:Tre musketörer / The Three Musketeers 2024
Hinthaaran kyläkuoro / The Hinthaara Village Choir
Pianist: Lago di Garda Music Festival, Italy 2024 (conducted by Mia Makaroff)
Greta tuotanto
Pianist: Max ja Moritz / Max and Moritz musical 2024 (Directed by Ville Saukkonen)
https://www.gretatuotanto.fi/max-and-moritz
Theatre musician in many productions from the 90’s to this day
Studio/ tour/ gig musician with e.g. The Leavings, Nordman, Mike Estes, Paul Oxley, Benny Törnroos, Annika Cleo, Monica Aspelund, Sonja Lumme, Ulf Krokfors, Affe Forsman, Jussi Kinnunen, Hannu Risku, Sami Saari, Mikko Iivanainen, Thomas Törnroos, Jani Snellman, Jiri Nikkinen, Kari Peitsamo, Petri Krzywacki, Sasha Charkin, Tero Vesterinen, Wade Mikkola, Allan Matheson, Tomas Takolander, Esko Grundström, Mika Tyyskä aka Mr.Fastfinger
producer
SaltFest 2023–
Katz Soul&Jazz Clubs and Soul&Jazz Time Out Clubs 2014– (with Thomas Törnroos)
grants
Svenska Kulturfonden 2023-2024, working grant of one year
Musiikin edistämissäätiö 2019, 2023, 2024, shorter working grants
Several production grants from e.g. Taike, MES, Svenska Kulturfonden, Konstsamfundet, Loviisan kaupunki