From the outset, its members have strived for authentic self-expression and sought to highlight the theatrical, dramatic, expressive and playful aspects of music. Their aim is to create an intimate musical dialogue while at the same time communicating not only among themselves but with their audience. The core ensemble consists of fortepiano, flute, oboe, clarinet, natural horn and bassoon, but can contract or expand from duo to octet or beyond. With this flexibility of instrumentation, the group embraces the full repertoire of chamber music for wind instruments, with or without piano, from around 1750 to 1850.

Thalia Ensemble has gradually established a pre-eminence in the field of Classical and early Romantic chamber music. The group has performed extensively in the Netherlands, Belgium, England, Germany, Poland and Portugal, both at the leading early-music festivals and in more intimate venues, including several historic locations. It was named 'Selected Promising Ensemble' in the International Young Artist’s Presentation at the 2012 AMUZ in Antwerp, and won first prize in the 2013 York Early Music International Young Artists’ Competition at the NCEM.

All the ensemble's musicians are experts on historical performance practice. At ease on several members of their instruments’ families, some may also play the modern counterparts of their instruments as well as, for instance, the recorder, cornett, even cello. Their music making is always informed by the most up-to-date research into historical interpretation, and seeks to explore thoroughly the rich timbres of the different instrumental combinations of each programme.