Trumpeter Peter Firšt (1998) received his master's degree at the Academy of Music in Zagreb, in the class of prof. Marin Zokić, and through the Erasmus program he also studied at the Ferenc Liszt Academy of Music in Budapest.

Since 2019, he has been the solo trumpeter of the Synchron Stage Orchestra Vienna, where he collaborates with conductors such as John Williams and Hans Zimmer. He recorded music for the film hits James Bond: No time to die, Harry Potter 20th Anniversary: ​​Return to Hogwarts, We can be heroes, Lost in Russia, Promising young woman and others, and the orchestra was also nominated for the most prestigious film award, the Oscar .

Since 2022, he has been employed at the Zagreb Philharmonic. As a guest solo trumpeter, he also works with the Salzburg Philharmonic and the RTV Slovenia symphony orchestra. He is the artistic director and trumpeter of the Zagreb Brass Quintet.

As a soloist, he performed with the wind and symphony orchestra of the Celje School of Music, the Celje String Orchestra, the Slovenian Police Orchestra, the Baroque Orchestra of the Academy of Music in Zagreb, the Liszt Ferenc Chamber Orchestra, the Zagreb Soloists and the Zagreb Philharmonic.

During his schooling, he was the absolute winner of the Woodwind&Brass competition in Varaždin, he won three times at the International Davorin Jenko Competition, and at the Slovenian national competition Temsig he also received a special prize for winning the highest possible number of points. He was also a semi-finalist at the international Citta de Porcia competition in Pordenone, Italy, and a finalist at the international trumpet competition in Budapest.

Composer and pianist Leon Firšt (1994) received his master's degree in composition from the Academy of Music in Ljubljana with prof. Dušan Bavdek.

He created more than 80 symphonic, chamber and solo compositions, which were performed several times at concerts in Slovenia and around the world. He is the author of the operetta  Usanjano život , which was presented in Bad Ischl as a new operetta from the Slovenian musical space within the JUMUM project and then performed in Eggenfelden (Germany) and Celje. For the composition  Romantic souls for symphony orchestra won the audience award at the Keuris composition contest in the Netherlands. The piece was later recorded and performed by the Slovenian Philharmonic. For the collection of compositions for violin and piano "Magic Forest" he received the 3rd prize in the senior category at the international composition competition "Artistes en Herbe" 2015. He received the Academy of Music's Prešeren Award for the author's evening organized by the Musical Youth of Ljubljana. His compositions for younger musicians are often chosen as mandatory compositions at various national competitions, while his chamber and orchestral compositions are regularly performed by the most prominent Slovenian musicians (Slovenian Philharmonic, RTV Orchestra, Slowind Quintet, Chamber String Orchestra of the Slovenian Philharmonic...). In 2016, he wrote music for the Celje musical Veronika Deseniška, which is considered to be one of the biggest music and theater shows of the year and has been seen by more than 25,000 spectators so far. The piece from the musical was also recorded by the RTV Symphony Orchestra, and the musical received the Celjska Zvezde cultural award. In 2016, at the invitation of prof. Uroša Rojka participated in the "Leicht über Linz" project, where the ensemble for contemporary music from the Basel Academy performed the composition Point of awareness , which he arranged for a larger ensemble at their request. In June 2017, the composition  Concert Tango , written for the trio Riveria and the Slovenian Philharmonic Orchestra, was performed at the opening concert of the Imago Sloveniae festival on Kongresne trg in Ljubljana.

His oeuvre also includes the chamber opera "In the Name of Love", which was performed at the Ljubljana Opera House and the Liszt Academy in Budapest, as well as stage and film music. In 2017, the Municipality of Celje awarded Leon the "Crystal coat of arms" award for exceptional academic success. He is the recipient of the Prešeren Prize of the University of Ljubljana in 2017. In 2018, he won the main prize at the Banaue International Music Composition Competition in the Philippines. His composition  Symphonic Waltz  for Symphony Orchestra was performed in August 2018 at the Berlin Konzerthaus. In 2019, the Slovenian Philharmonic ordered the composition  Refleksije from him for its concert subscription. On the occasion of the centenary of the University of Ljubljana, the seven-movement suite  Septem Artes Liberales  for soprano, three actresses, piano, percussion ensemble, big band and symphony orchestra, written for the occasion, was performed at the central celebratory academy. In 2021, he wrote the music for a musical based on Lila Prap  Kure and the music for the internationally successful documentary Wild Slovenia. Leon is also an active jazz pianist and member of the band Funk fact.

Double bass player Miha Firšt (1992) studied double bass at the Academy of Music in Ljubljana, the University of Arts in Graz and the Academy of Music in Zagreb.

He is a member of the chamber ensemble Salzmusique, regularly performs in a duo with pianist Iztok Kocen, in opera productions of the Slovenian Chamber Music Theatre, concert productions of the Celje House of Culture, collaborates with the Slowind quintet and the Slovenian String Sextet. He performs in festivals and cycles such as Festival Ljubljana, Srebrni abonma, Druga godba, chamber festival in Mantua, Cologne summer festival, with musicians such as Matej Haas, Nejc Mikolič, Mate Bekavac, Andrej Zupan, Irena Grafenauer, Bozena Angelova and others.

In the years 2016-2019, he was the solo double bass player of the Philharmonie Salzburg Symphony Orchestra, and since 2018 he has been the solo double bass player of the Camerata Sinfonica Austria orchestra. He also collaborates with the Berlin Symphony, the Zagreb Soloists, the Zagreb Philharmonic, the Ljubljana Soloists, the RTV Slovenia Symphony Orchestra, the SNG Maribor Opera Orchestra and the SNG Opera and Ballet Orchestra Ljubljana.

In 2018, as a theater performer, he staged Patrick Süskind's monodrama Kontrabas, and he is currently performing in the author's monodrama Komedija o artu. He teaches at music schools in Ljubljana and Škofja Loka. Since 2019, he is the CEO of House of Culture Celje.