The ORIGINAL PRAGUE SYNCOPATED ORCHESTRA (OPSO) is a leading professional ensemble in the Czech Republic, focusing on authentic interpretation of early - 1920's - American Jazz, Blues and Dance Music. It is considered the stylistically most pure and artistically most convincing ensemble of its kind.

Thanks to use of historical instruments, original playing techniques and sophisticated arrangements, the sound of the orchestra is both uniquely authentic and original at the same time.

​The orchestra was founded in 1974 by trumpeter, pianist and musicologist Pavel Klikar, a leading expert in the genre. In 2018 the management took his young followers Jan Pospíšil and Michael Chomiszak with a big help pianists and co-founder of ensemble Jiří Gilík.