Cesár Sampson (born 18 August 1983) is an Austrian singer, songwriter, producer, dancer and model.

Borislav "Boby" Milanov is the CEO with the other members being Johan Alkenäs, Joacim Persson and Cesár Sampson himself.

Symphonix has been involved in the launching of a number of songs particularly for the Eurovision Song Contest including "Dance Alone" by Macedonian singer Jana Burčeska, "Bones" by Bulgarian band Equinox, "Beautiful Mess" by Bulgarian singer Kristian Kostov and Cesár Sampson's own entry for Austria "Nobody but You".

[1] Sampson performed backing vocals for the Bulgarian acts for two consecutive years in the Eurovision Song Contest.

Later that year, he appeared as a guest star in the Christmas edition of the Spanish TV program Operación Triunfo.