Marcin Masecki (born 6 September 1982 in Warsaw) is a Polish avant garde pianist, composer and conductor.

At this time he formed his first jazz trio with Wojciech Pulcyn on bass and Grzegorz Grzyb on drums and joined the band Alchemik.

In 2015, he released “Beethoven: The Last Sonatas” performed with ear stoppers and noise-blocking headphones, in order to experience the perspective of the deaf composer.

[8] 2017 saw the release of Chopin: Nocturnes played on his faithful companion - a small 6-octave upright piano which he rarely tunes.

In 2015, he was commissioned to write a large piece for the Voluntary Firebrigade Brass Orchestra from Słupca which became his "Symphony nr 1" and was released on CD.

He also composed "Wolność" for the cello ensemble Cellonet, performed at Warsaw's Royal Castle at the opening of the IX Witold Lutosławski Competition.

More recently he wrote "We Are Crying" for women's choir and brass orchestra on commission from the Jazztopad Festival in Wrocław.

As session musician he has worked with Tomasz Stańko, Wojciech Waglewski, Zbigniew Namysłowski, Michał Urbaniak and Barry Guy among others.

[14] His music was featured in plays by Wojciech Urbański (Miron Białoszewski: Tajny Dziennik)[15] and Natalia Korczakowska (Solaris and Pasażerka).