Mathias Heise’s current projects.
Mathias Heise Orchestra
Mathias Heise Orchestra moves at the intersection of jazz, rock, indie, and contemporary orchestral music. It is a “stadium jazz experience”, with references ranging from the open, melodic universe of the Pat Metheny Group to the emotional power known from more recent Nordic rock.
Line-up: Mathias Heise (harmonica and keyboards), Laura Smidl (vocals and keyboards), Pelle von Bülow (guitar), Mads Christiansen (guitar), Rasmus Sørensen (piano and keyboards), Conor Chaplin (bass), and Severi Sorjonen (drums).
Mathias Heise Quadrillion
Mathias Heise Quadrillion has existed since 2014 playing a refreshingly unique fusion of funk, rock and jazz.
So far, they have released three albums:
Sudden Ascent in 2015, Decadence in 2018 (mixed and mastered by Grammy-winning Erik Zobler), and Quadrillion in 2022 – all on Giant Sheep Music.
Mathias Heise plays harmonica and keyboards as well as writes most of the material. The other band members are Mads Christiansen (guitar), David Vang (bass), and Frederik Bülow (drums).
Mathias Heise Quartet/Quintet
Mathias Heise Quintet’s first album Mouth Games was released October 2023.
The style is modern jazz, both original compositions by Mathias Heise and new interpretations of jazz classics – with a nod to harmonica great Toots Thielemans.
Album line-up: Mathias Heise (harmonica), Jacob Christoffersen (piano), Thomas Fonnesbæk (bass), Jeppe Gram (drums), Pelle von Bülow (guitar).
Live line-up varies.
Heise/von Bülow Duo
Heise/von Bülow Duo’s first album “Repertoire” was released august 2026.
Mathias Heise and excellent guitarist Pelle von Bülow play standards, covers as well as original compositions. The style is jazz and soul with one or two Danish classics thrown in.
Mathias Heise and Bjarke Mogensen
Jazz meets classic. Mathias Heise teams up with internationally acclaimed accordion virtuoso Bjarke Mogensen in this highly innovative and unique duo.
Heise and Mogensen They play a mix of original compositions and classical pieces arranged for harmonica and accordion by the duo.
Listen to their first album Flux from 2025.
Action 4S
An international super group consisting of four of the most charismatic, innovative, and brilliant musicians on the contemparory jazz scene
The Action 4S play modern jazz/fusion originals penned by the group’s members: Mathias Heise (harmonica), Anton Eger (drums), Conor Chaplin (bass), and Rasmus Sørensen (piano).
The group released their first album THE ACTION 4S in 2025.