Starting as The Flying Stars, on April 16 1966 she changed their name to The Op-Sound.
A dutch band from Roosendaal.

Members:
Piet van Trijp (solo guitar, vocals)
Fred Baarda (guitar, vocals) (Alliases Jo Zambo)
Cor van Dongen (bass, vocals) 1966-1967
Bas de Ridder (bass guitar) from the end of 1967
René de Kok (drums)
Carin (Caryn) Koevoets (singing) also regularly performed with the group.