He has given numerous memorable concerts with smaller and bigger natinal and international set-ups. He could try out few of his records only at the festival and the recorded material and CD-s became the starting point of Villa Negra, In ragtime, etc. Now we recollect the 30 year old International Jazz concert series Győr, predecessor of MEDIAWAVE Festival. Isvtán Grencsó was already there as a young musician at the beginning of his career as the leader of the Masina Jazz Group from Szombathely/Kőszeg on the first concert day in March 1982. Then, the american saxophone player, Anthony Braxton who was at the peak of his career came to Hungary which was quite huge for the jazz lover audience in Hungary and other neighbouring socialist countries. Until this event only the state could have organized something like this, or more specificly in state organization it would have never happened for sure.