His music spans many genres including Blues, Jazz, Rock(psychedelic and Progressive), Tango and Techno.
Groups and associated acts:
- The Orgiastic Nalle Puh Big Band
- Viisi vierasta miestä ("Five foreign men")
- Numminen, Tommi Parko, Kullervo Aura, Heikki Kasari and Veli Verronen
- Gommi ja Pommi
- Underground Rock Orchestra
- Riemu-Trio
- Sähkökvartetti ('The Electric Quartet)
- Suomen Talvisota 1939–1940 (The Finnish Winter War 1939-1940) 1969-1970
- Uusrahvaanomainen Jatsiorkesteri (Neo-Vulgar Jazz Orchestra) 1970-
Examples:
- Everything Is an Instrument: Phonebook with brushes
. - Fairy Tale: The "Jag vill inte vara prinsessa" song on the album with the same name.
- Limited Lyrics Song: "Jänikset ja ihmiset"
- Only Known by Initials: Mauri Antero Numminen is know as as M.A. Numminen.
- Scatting: Numminen scatting I´m All Of Me" and I´m In The Mood For Love in four different language versions Finnish, English, Swedish and German.
- Silly Rabbit, Idealism Is for Kids!: "Jag vill inte vara prinsessa" starts with numminen telling that he believed in those fairly tales where the princes get the princess after beating a witch. The stories and dreams changed at "the door to adulthood" and the prince might find the Witch to be more enchanting and that he no longer believe in those fairytales.
- Stage Names: La Kamarado, Ruotsin Kuningas, Viljo Kyttälä, Oriveden Kenkätehdas, Usko Suomalainen, E. Väline, Gommi, M.A. Numminen is some times also shortened to just M.A.N.
- Stylistic Suck: Often uses this. Especially with the singing, like sliding the tone up and down seemingly randomly (but quite artfully), suddenly switching to a falsetto 'scream' and the back to 'normal'. There also many examples of instruments being played badly, lyrics not fitting with the music, and so on.
- Translated Cover Version: He have done a lot of these like:
- "Slå mig med din rytmpinne" a swedish cover of Ian Dury's "Hit Me With Your Rhythm Stick"
- "När regnet öser ner" a cover of "I'm Singing in the rain" by Gene Kelly
- "Tunnelmassa" a Finnish cover of In The Mood. That "In The Mood" was instrumental and had no lyrics to translate wasn't a problem.
- "Et Kai Ymmärrä Minua Väärin" a finnish cover of "Don't Let Me Be Misunderstood".
- "Itsy Bitsy" finnish cover of "Itsy Bitsy Teenie Weenie Yellow Polkadot Bikini".
- "Kuinka Saisin Rikki Kookospähkinän" finnish cover of "I've Got a Lovely Bunch of Coconuts".
- "Yes Sir, ich kann Boogie" and german cover of Baccara's "Yes Sir, I Can Boogie".
