An important part of Krisztián Oláh's music is both classical musical elements and compositional techniques, as well as the improvisational drift and abstract rhythms of contemporary jazz. His main musical motivation is to combine and synthesise these two musical worlds in as organic a way as possible, with the aim of creating a dynamic, living contemporary musical world. The Quartet is Krisztián's most important musical project, and this is evident not only in the songs, but also in the atmosphere that the four musicians are able to create. The band's repertoire is based on Krisztián's own compositions, but the members are also all great improvisers, so spontaneous and collective improvisation is an integral part of their productions, which incorporates the spirit and musical tools of the day, creating a fresh and complex sound. 

At the age of 17, pianist and composer Krisztián Oláh won the soloist prize at the International Jazz Competition in Târgu Mures, and in the following years he performed with great success at several European competitions in England, Lithuania and the Netherlands. At the age of just 20, he won third place at the Montreux Jazz Festival, which gave him the chance to attend a two-week academic course and perform with musicians such as Al Jarreau, Kurt Rosenwinkel and Joe Sanders. In 2018 he was the first Hungarian jazz pianist to qualify for the Washington DC finals of the Thelonious Monk Institute International Piano Competition. He has been awarded several Hungarian prizes for his compositions and work as a pianist.

His thinking about music and composition changed fundamentally when he started studying composition at the Liszt Academy in 2020. Compared to the debut album At the back of my mind (2020), Crescendo (2022) shows that Krisztián is turning from impulsive, instinctive writing to consciousness. Their third full-length album, Music for 24/7, was released in the spring of 2023, featuring one of Britain's emblematic wind sections, TRYPL Horns (Ryan Quigley, Paul Booth, Trevor Mires).