Viktor Magyaróvári (born 12 May 1985, Mezőhegyes), known by his stage name Kayamar, is a Hungarian singer, jazz and classical composer. He has abilities in the areas of hearing (Hertz-pitch that is even more precise than absolute pitch), vocal range (it is proven that he has more than 5 octaves from Ab0-C6 being one of the lowest basses in the world) and improvisation. Kayamar gained recognition from the media in 2011 when he won the 1st prize in the T-mobile's composers' competition.